14,557 results match your criteria Experimental brain research. Experimentelle Hirnforschung. Experimentation cerebrale[Journal]


Playing Super Mario increases oculomotor inhibition and frontal eye field grey matter in older adults.

Exp Brain Res 2018 Dec 15. Epub 2018 Dec 15.

Centre de Recherche en Neuropsychologie et Cogntion, University of Montreal, Pavillon Marie-Victorin 90, Avenue Vincent d'Indy, Montreal, QC, H2V 2S9, Canada.

Aging is associated with cognitive decline and decreased capacity to inhibit distracting information. Video game training holds promise to increase inhibitory mechanisms in older adults. In the current study, we tested the impact of 3D-platform video game training on performance in an antisaccade task and on related changes in grey matter within the frontal eye fields (FEFs) of older adults. Read More

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http://dx.doi.org/10.1007/s00221-018-5453-6DOI Listing
December 2018

Power and phase coherence in sensorimotor mu and temporal lobe alpha components during covert and overt syllable production.

Exp Brain Res 2018 Dec 14. Epub 2018 Dec 14.

Department of Hearing, Speech, and Language Sciences, Gallaudet University, 800 Florida Ave, Washington, DC, USA.

The sensorimotor dorsal stream is known to activate in both overt and covert speech production. However, overt production produces sensory consequences that are absent during covert production. Thus, the purpose of the current study is to investigate differences in dorsal stream activity between these two production conditions across the time course of utterances. Read More

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http://dx.doi.org/10.1007/s00221-018-5447-4DOI Listing
December 2018

Self-face and self-body advantages in congenital prosopagnosia: evidence for a common mechanism.

Exp Brain Res 2018 Dec 12. Epub 2018 Dec 12.

NeuroMI-Milan Center for Neuroscience, Milano, Italy.

Prosopagnosia is a disorder leading to difficulties in recognizing faces. However, recent evidence suggests that individuals with congenital prosopagnosia can achieve considerable accuracy when they have to recognize their own faces (self-face advantage). Yet, whether this advantage is face-specific or not is still unclear. Read More

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http://dx.doi.org/10.1007/s00221-018-5452-7DOI Listing
December 2018

Variable and intermittent grip force control in response to differing load force dynamics.

Exp Brain Res 2018 Dec 12. Epub 2018 Dec 12.

Department of Psychology, Center for Cognition, Action, and Perception, University of Cincinnati, Edwards Center 1, Cincinnati, OH, 45221-0376, USA.

A recent study (Grover et al. Exp Brain Res 236(10):2531-2544, 2018) found that the grip force applied to maintain grasp of a hand-held object exhibited intermittent coupling to the changing load forces exerted by the object as it was oscillated. In particular, the strength and consistency of grip force response to load force oscillations was tied to overall load force levels and the prominence of load force oscillations. Read More

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http://dx.doi.org/10.1007/s00221-018-5451-8DOI Listing
December 2018

Do individual differences in the distribution of activation between synergist muscles reflect individual strategies?

Exp Brain Res 2018 Dec 6. Epub 2018 Dec 6.

Faculty of Sport Sciences, Laboratory "Movement, Interactions, Performance" (EA 4334), University of Nantes, 25 bis boulevard Guy Mollet, 44300, Nantes, France.

Individual differences in the distribution of activation between synergist muscles have been reported during a wide variety of tasks. Whether these differences represent actual individual strategies is unknown. The aims of this study were to: (i) test the between-day reliability of the distribution of activation between synergist muscles, (ii) to determine the robustness of these strategies between tasks, and to (iii) describe the inter-individual variability of activation strategies in a large sample size. Read More

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http://dx.doi.org/10.1007/s00221-018-5445-6DOI Listing
December 2018

Judging risk magnitude: walking to the left and base jumping to the right.

Exp Brain Res 2018 Dec 11. Epub 2018 Dec 11.

School of Psychology, Social Work and Social Policy, University of South Australia, Adelaide, Australia.

When thinking about quantifiable domains such as numbers, pitch, and size, they are implicitly mapped on to representational space with small/low/less and large/high/more of the respective domain represented on the left and right sides of representational space, respectively. Recent research has also demonstrated that more abstract domains (colours, language, political party names) are also mapped in the same way. This study investigated a new abstract domain, risk, to examine if this same pattern of effects is apparent (left = low risk/right = high risk) to get a better understanding of how risk magnitudes are processed. Read More

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http://dx.doi.org/10.1007/s00221-018-5449-2DOI Listing
December 2018

The effect of light touch on standing sway when the stability of the external touch reference becomes unreliable.

Exp Brain Res 2018 Dec 11. Epub 2018 Dec 11.

Department of Occupational Therapy, Faculty of Rehabilitation Medicine, University of Alberta, 2-64 Corbett Hall, Edmonton, AB, T6G 2G4, Canada.

Lightly touching a stable reference is associated with sway reduction during standing. Unexpected displacement of the touch reference results in a false-positive balance reaction in some participants, but only with the first such disturbance. This study investigated whether light touch reduces standing sway (1) after the touch reference becomes unreliable, and (2) when participants are aware the touch reference is unreliable. Read More

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http://dx.doi.org/10.1007/s00221-018-5455-4DOI Listing
December 2018

Time course of changes in corticospinal excitability induced by motor imagery during action observation combined with peripheral nerve electrical stimulation.

Exp Brain Res 2018 Dec 8. Epub 2018 Dec 8.

Tokyo Bay Rehabilitation Hospital, 4-1-1 Yatsu, Narashino-shi, Chiba, 275-0026, Japan.

While previous studies assessed corticospinal excitability changes during and after motor imagery (MI) or action observation (AO) combined with peripheral nerve electrical stimulation (ES), we examined, for the first time, the time course of corticospinal excitability changes for MI during AO combined with ES (AO-MI + ES) using transcranial magnetic stimulation to measure motor evoked potentials (MEPs) in healthy individuals. Fourteen healthy volunteers participated in the following three sessions on different days: AO-MI alone, ES alone, and AO-MI + ES. In the AO-MI task, participants imagined squeezing and relaxing a ball, along with the respective actions shown in a movie, while passively holding the ball. Read More

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http://dx.doi.org/10.1007/s00221-018-5454-5DOI Listing
December 2018

Effect of caffeine on long-term potentiation-like effects induced by quadripulse transcranial magnetic stimulation.

Exp Brain Res 2018 Dec 10. Epub 2018 Dec 10.

Department of Neuro-Regeneration, Fukushima Medical University, 1 Hikarigaoka, Fukushima, Fukushima, Japan.

Caffeine, an adenosine receptor antagonist, is known to affect sleep-awake cycles, the stress response, and learning and memory. It has been suggested that caffeine influences synaptic plasticity, but the effects of caffeine on synaptic plasticity in the human brain remain unexplored. The present study aimed to investigate the effects of caffeine on long-term potentiation (LTP)-like effects in the primary motor cortex of healthy humans. Read More

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http://dx.doi.org/10.1007/s00221-018-5450-9DOI Listing
December 2018

Impact of extremely low-frequency magnetic fields on human postural control.

Exp Brain Res 2018 Dec 5. Epub 2018 Dec 5.

Lawson Health Research Institute, St. Joseph Hospital, London, ON, Canada.

Studies have found that extremely low-frequency (ELF, < 300 Hz) magnetic fields (MF) can modulate standing balance; however, the acute balance effects of high flux densities in this frequency range have not been systematically investigated yet. This study explores acute human standing balance responses of 22 participants exposed to magnetic induction at 50 and 100 mTrms (MF), and to 1.5 mA alternating currents (AC). Read More

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http://link.springer.com/10.1007/s00221-018-5442-9
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http://dx.doi.org/10.1007/s00221-018-5442-9DOI Listing
December 2018
8 Reads

Persistence in postural dynamics is dependent on constraints of vision, postural orientation, and the temporal structure of support surface translations.

Exp Brain Res 2018 Dec 1. Epub 2018 Dec 1.

Department of Biomechanics, University of Nebraska at Omaha, BRB#210, Biomechanics Research Building, 6160 University Drive, Omaha, NE, 68182-0860, USA.

Activities of daily living require maintaining upright posture within a variety of environmental constraints. A healthy postural control system can adapt to different environmental constraints. Afferent sensory information is used to determine where the body is in relation to the gravitational vertical and efferent motor commands make corrections with the goal of keeping the center of mass within the base of support. Read More

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http://link.springer.com/10.1007/s00221-018-5444-7
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http://dx.doi.org/10.1007/s00221-018-5444-7DOI Listing
December 2018
3 Reads

Improving the functionality, robustness, and adaptability of myoelectric control for dexterous motion restoration.

Exp Brain Res 2018 Nov 30. Epub 2018 Nov 30.

State Key Laboratory of Robotics and System, Harbin Institute of Technology, #3039, HIT Science Park, No. 2 Yikuang Street, Nangang District, Harbin, 150081, China.

The development of advanced and effective human-machine interfaces, especially for amputees to control their prostheses, is very high priority and a very active area of research. An intuitive control method should retain an adequate level of functionality for dexterous operation, provide robustness against confounding factors, and supply adaptability for diverse long-term usage, all of which are current problems being tackled by researchers. This paper reviews the state-of-the-art, as well as, the limitations of current myoelectric signal control (MSC) methods. Read More

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http://dx.doi.org/10.1007/s00221-018-5441-xDOI Listing
November 2018
3 Reads

Alterations in oscillatory cortical activity indicate changes in mnemonic processing during continuous item recognition.

Exp Brain Res 2018 Nov 28. Epub 2018 Nov 28.

Experimental Psychology I, Institute of Psychology, Osnabrück University, Neuer Graben 29, 49074, Osnabrück, Germany.

The classification of repeating stimuli as either old or new is a general mechanism of everyday perception. However, the cortical mechanisms underlying this process are not fully understood. In general, mnemonic processes are thought to rely on changes in oscillatory brain activity across several frequencies as well as their interaction. Read More

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http://dx.doi.org/10.1007/s00221-018-5439-4DOI Listing
November 2018

Where is my mind? Examining mind-wandering and vigilance performance.

Exp Brain Res 2018 Nov 27. Epub 2018 Nov 27.

Department of Psychology, University of Central Florida, College of Sciences, Orlando, FL, USA.

Vigilance is the ability to sustain attention to information for prolonged periods of time, particularly in environments where critical signals may be rare. Recent research in the domain of mind-wandering has suggested that processes associated with mind-wandering may underpin the typical decline in vigilance task performance. Current methods for measuring mind-wandering either disrupt vigils by asking probe questions throughout the task, or, require observers to reflect on how much mind-wandering occurred during the task upon conclusion of the vigil. Read More

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http://dx.doi.org/10.1007/s00221-018-5438-5DOI Listing
November 2018

Attentional cost in additional visual feedback protocols in healthy young subjects.

Exp Brain Res 2018 Nov 27. Epub 2018 Nov 27.

Laboratoire Interdisciplinaire de Biologie de la Motricité, EA 7424, Université de Savoie-Mont-Blanc, Domaine Scientifique de Savoie-Technolac, 73376, Le Bourget du Lac cedex, France.

Additional visual feedback (VFB) is a technique allowing improved postural stability in young healthy individuals despite an increased muscular activity, the two trends being assessed through center-of-gravity (CG) and differences between CG and center-of-pressure (CP) movements (CP-CG), respectively. These two opposing effects are likely explained by the respective contribution of automatic and voluntary controls and in turn the neural circuits involved. To specify these specific contributions, a dual-task protocol was set up, consisting in adding to VFB a navigation task performed at the maximum cognitive capacities of the subjects who were evaluated beforehand. Read More

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http://dx.doi.org/10.1007/s00221-018-5433-xDOI Listing
November 2018
3 Reads

Proprioceptive deficits in inactive older adults are not reflected in fast targeted reaching movements.

Exp Brain Res 2018 Nov 26. Epub 2018 Nov 26.

School of Psychology, University of Birmingham, Birmingham, UK.

During normal healthy ageing there is a decline in the ability to control simple movements, characterised by increased reaction times, movement durations and variability. There is also growing evidence of age-related proprioceptive loss which may contribute to these impairments. However, this relationship has not been studied in detail for the upper limb. Read More

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http://dx.doi.org/10.1007/s00221-018-5440-yDOI Listing
November 2018

Effects of stimulus intensity and auditory white noise on human somatosensory cognitive processing: a study using event-related potentials.

Exp Brain Res 2018 Nov 24. Epub 2018 Nov 24.

Department of Health Sciences, Faculty of Human Life and Environment, Nara Women's University, Kitauoya-Nishi Machi, Nara, 630-8506, Japan.

Exposure to auditory white noise has been shown to facilitate cognitive function. This phenomenon is often called stochastic resonance, and a moderate amount of auditory noise has been suggested to benefit individuals in hypodopaminergic states. Previous studies using psychophysic methods reported that stochastic resonance was sensitive to stimulus intensity; however, the relationship between neural activities elicited by different stimulus intensities and auditory white noise has not yet been clarified Thus, the present study aimed to investigate the effects of stimulus intensity (Experiment 1) and auditory white noise (Experiment 2) on behavioral data (reaction time (RT), the standard deviation of RT, and error rates), and the N140 and P300 components of event-related potentials (ERPs) in somatosensory Go/No-go paradigms. Read More

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http://dx.doi.org/10.1007/s00221-018-5443-8DOI Listing
November 2018

Transcranial Doppler sonography reveals sustained attention deficits in young adults diagnosed with ADHD.

Exp Brain Res 2018 Nov 22. Epub 2018 Nov 22.

Department of Psychology, George Mason University, 4400 University Dr MS3F5, Fairfax, VA, 22030-4444, USA.

The National Institute of Mental Health has recently launched the Research Domain Criteria framework that seeks to inform clinical classification schemes by elevating the status of neuroscience research in the diagnosis of mental disorders. The current research seeks to contribute to that initiative by using a neurophysiological measure, transcranial Doppler sonography that has been shown to be sensitive to decrements in sustained attention and may provide an additional biomarker of executive dysfunction in ADHD. Twenty-seven participants performed a 12-min vigilance task while cerebral blood flow velocity (CBFV) was recorded. Read More

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http://dx.doi.org/10.1007/s00221-018-5432-yDOI Listing
November 2018

The success of the representation maintenance affects the memory-guided search processing: an ERP study.

Exp Brain Res 2018 Nov 21. Epub 2018 Nov 21.

Key Laboratory for NeuroInformation of Ministry of Education, High-Field Magnetic Resonance Brain Imaging Key Laboratory of Sichuan Province, Center for Information in Medicine, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, China.

Previous evidence showed that working memory (WM) contents can bias visual selection. However, less is known about how the WM effects change when the WM representation is not held successfully. Here, we investigated this problem using event-related potentials. Read More

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http://dx.doi.org/10.1007/s00221-018-5430-0DOI Listing
November 2018

Different tool training induces specific effects on body metric representation.

Exp Brain Res 2018 Nov 20. Epub 2018 Nov 20.

Department of Psychology, University of Milano Bicocca, Piazza Ateneo Nuovo 1, Milan, 20126, Italy.

Morphology and functional aspects of the tool have been proposed to be critical factors modulating tool use-induced plasticity. However, how these aspects contribute to changing body representation has been underinvestigated. In the arm bisection task, participants have to estimate the length of their own arm by indicating its midpoint, a paradigm used to investigate the representation of the metric properties of the body. Read More

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http://dx.doi.org/10.1007/s00221-018-5405-1DOI Listing
November 2018
2 Reads

Short-term inhibition of spinal reflexes in multiple lower limb muscles after neuromuscular electrical stimulation of ankle plantar flexors.

Exp Brain Res 2018 Nov 20. Epub 2018 Nov 20.

Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902, Japan.

Neuromuscular electrical stimulation (NMES) of lower limbs elicits muscle contractions through the activation of efferent fibers and concomitant recruitment of afferent fibers, which can modulate excitability of the central nervous system. However, neural mechanisms of NMES and how unilateral stimulation of the soleus affects spinal reflexes in multiple lower limb muscles bilaterally remains unknown. Twelve able-bodied participants were recruited, and spinal reflex excitability changes were tested after four interventions, each applied for 60 s, on the right plantar flexors: (1) motor-level NMES; (2) sensory-level NMES; (3) voluntary contraction; (4) rest. Read More

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http://dx.doi.org/10.1007/s00221-018-5437-6DOI Listing
November 2018
7 Reads

Biomechanical and neurocognitive performance outcomes of walking with transtibial limb loss while challenged by a concurrent task.

Exp Brain Res 2018 Nov 20. Epub 2018 Nov 20.

Department of Kinesiology, School of Public Health, University of Maryland, College Park, MD, USA.

Individuals who have sustained loss of a lower limb may require adaptations in sensorimotor and control systems to effectively utilize a prosthesis, and the interaction of these systems during walking is not clearly understood for this patient population. The aim of this study was to concurrently evaluate temporospatial gait mechanics and cortical dynamics in a population with and without unilateral transtibial limb loss (TT). Utilizing motion capture and electroencephalography, these outcomes were simultaneously collected while participants with and without TT completed a concurrent task of varying difficulty (low- and high-demand) while seated and walking. Read More

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http://dx.doi.org/10.1007/s00221-018-5419-8DOI Listing
November 2018
1 Read

Quantitative analysis of multi-element synergy stabilizing performance: comparison of three methods with respect to their use in clinical studies.

Exp Brain Res 2018 Nov 20. Epub 2018 Nov 20.

Department of Kinesiology, The Pennsylvania State University, Rec.Hall-267, University Park, PA, 16802, USA.

A number of analyses associated with the uncontrolled manifold (UCM) hypothesis have been used recently to investigate stability of actions across populations. We explored whether some of those methods have an advantage for clinical studies because they require fewer trials to achieve consistent findings. We compared the number of trials needed for the analysis of inter-trial variance, analysis of motor equivalence, and analysis in the space of referent coordinates. Read More

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http://dx.doi.org/10.1007/s00221-018-5436-7DOI Listing
November 2018
3 Reads

Central contributions to torque depression: an antagonist perspective.

Exp Brain Res 2018 Nov 19. Epub 2018 Nov 19.

Neuromechanical Performance Research Laboratory, Department of Human Health and Nutritional Sciences, College of Biological Sciences, University of Guelph, Guelph, ON, Canada.

Torque depression (TD) is the reduction in steady-state isometric torque following active muscle shortening when compared to an isometric reference contraction at the same muscle length and activation level. Central nervous system excitability differs in the TD state. While torque production about a joint is influenced by both agonist and antagonist muscle activation, investigations of corticospinal excitability have focused on agonist muscle groups. Read More

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http://link.springer.com/10.1007/s00221-018-5435-8
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http://dx.doi.org/10.1007/s00221-018-5435-8DOI Listing
November 2018
2 Reads

Correction to: Trunk, head and pelvis interactions in healthy children when performing seated daily arm tasks.

Exp Brain Res 2018 Nov 16. Epub 2018 Nov 16.

Department of Rehabilitation, Donders Centre for Neuroscience, Radboud University Medical Center, 9101, 6500 HB, Nijmegen, The Netherlands.

The authors inadvertently submitted a wrong figure part for publication. Figure 8b should be as follows. Read More

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http://dx.doi.org/10.1007/s00221-018-5429-6DOI Listing
November 2018

5-HT blockade for dyskinesia and psychosis in Parkinson's disease: is there a limit to the efficacy of this approach? A study in the MPTP-lesioned marmoset and a literature mini-review.

Exp Brain Res 2018 Nov 15. Epub 2018 Nov 15.

Neurodegenerative Disease Group, Montreal Neurological Institute, 3801 University St, BT 209, Montreal, QC, H3A 2B4, Canada.

Virtually every patient affected by Parkinson's disease (PD) eventually requires treatment with L-3,4-dihydroxyphenylalanine (L-DOPA), which leads to complications such as dyskinesia and psychosis. Whereas blockade of serotonin 2A (5-HT) receptors appears to be an effective way to reduce both dyskinesia and psychosis, whether it has the potential to eliminate the two phenomena remains to be determined. In a previous study, we showed that highly selective 5-HT receptor blockade with EMD-281,014, at plasma levels comparable to those achieved in the clinic, reduced dyskinesia and psychosis-like behaviours (PLBs), in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-lesioned marmoset. Read More

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http://dx.doi.org/10.1007/s00221-018-5434-9DOI Listing
November 2018

Abnormal eyeblink conditioning is an early marker of cerebellar dysfunction in preclinical SCA3 mutation carriers.

Exp Brain Res 2018 Nov 14. Epub 2018 Nov 14.

Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.

Background: Spinocerebellar ataxias (SCAs) are a group of autosomal dominantly inherited degenerative diseases. As the pathological process probably commences years before the first appearance of clinical symptoms, preclinical carriers of a SCA mutation offer the opportunity to study the earliest stages of cerebellar dysfunction and degeneration. Eyeblink classical conditioning (EBCC) is a motor learning paradigm, crucially dependent on the integrity of the olivocerebellar circuit, and has been shown to be able to detect subtle alterations of cerebellar function, which might already be present in preclinical carriers. Read More

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http://link.springer.com/10.1007/s00221-018-5424-y
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http://dx.doi.org/10.1007/s00221-018-5424-yDOI Listing
November 2018
2 Reads

Mirror-hand selection is influenced by training perspective and model skill level in a motor-learning task.

Authors:
John J Buchanan

Exp Brain Res 2018 Nov 13. Epub 2018 Nov 13.

Perception-Action Dynamics Lab, Department of Health and Kinesiology, Texas A&M University, 4243 TAMU, College Station, TX, 77843, USA.

This study examined mirror and non-mirror arm selection processes in an observational learning context. Observer groups watched either a novice (instruction or discovery) or skilled model performing a bimanual task with the right arm leading the left arm. The models were viewed from a third-person perspective. Read More

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http://dx.doi.org/10.1007/s00221-018-5428-7DOI Listing
November 2018

Enhanced vestibulo-ocular reflex suppression in dancers during passive high-velocity head impulses.

Exp Brain Res 2018 Nov 13. Epub 2018 Nov 13.

Faculté de médecine, École d'orthophonie et d'audiologie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montreal, QC, H3C 3J7, Canada.

The vestibulo-ocular reflex (VOR) is responsible for stabilizing images on the fovea during head movements. However, in some situations, one needs to suppress the VOR to be able to follow a target moving along with the head. Evidence suggests that the visual mechanism underlying VOR suppression can be modulated by experience. Read More

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http://link.springer.com/10.1007/s00221-018-5431-z
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http://dx.doi.org/10.1007/s00221-018-5431-zDOI Listing
November 2018
3 Reads

Differential effects of vestibular processing on orienting exogenous and endogenous covert visual attention.

Exp Brain Res 2018 Nov 12. Epub 2018 Nov 12.

Center for Neuroprosthetics, Brain Mind Institute, Faculty of Life Sciences, School of Life Science, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland.

Recent research highlights the overwhelming role of vestibular information for higher order cognition. Central to body perception, vestibular cues provide information about self-location in space, self-motion versus object motion, and modulate the perception of space. Surprisingly, however, little research has dealt with how vestibular information combines with other senses to orient one's attention in space. Read More

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http://link.springer.com/10.1007/s00221-018-5403-3
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http://dx.doi.org/10.1007/s00221-018-5403-3DOI Listing
November 2018
9 Reads

Cognitive-perceptual load modulates hand selection in left-handers to a greater extent than in right-handers.

Exp Brain Res 2018 Nov 10. Epub 2018 Nov 10.

Department of Kinesiology and Neurology, The Pennsylvania State University, University Park, PA, 16802, USA.

Previous studies have proposed that selecting which hand to use for a reaching task appears to be modulated by a factor described as "task difficulty," defined by either the requirement for spatial precision or movement sequences. However, we previously reported that analysis of the movement costs associated with even simple movements plays a major role in hand selection. We further demonstrated, in right-handers, that cognitive-perceptual loading modulates hand selection by interfering with the analysis of such costs. Read More

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http://link.springer.com/10.1007/s00221-018-5423-z
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http://dx.doi.org/10.1007/s00221-018-5423-zDOI Listing
November 2018
3 Reads

Cognitive resilience after prolonged task performance: an ERP investigation.

Exp Brain Res 2018 Nov 9. Epub 2018 Nov 9.

Institute of Cognitive Neuroscience and Psychology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary.

Deleterious consequences of cognitive fatigue might be avoided if people respond with increased effort to increased demands. In this study, we hypothesized that the effects of fatigue would be more pronounced in cognitive functions reflecting compensatory effort. Given that the P3a event-related potential is sensitive to the direction and amount of attention allocated to a stimulus array, we reasoned that compensatory effort would manifest in increased P3a amplitudes. Read More

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http://link.springer.com/10.1007/s00221-018-5427-8
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http://dx.doi.org/10.1007/s00221-018-5427-8DOI Listing
November 2018
4 Reads

The dominant role of functional action representation in object recognition.

Exp Brain Res 2018 Nov 9. Epub 2018 Nov 9.

State Key Laboratory of Brain and Cognitive Science, Institute of Psychology, Chinese Academy of Sciences, 16 Lincui Rd., Chaoyang District, Beijing, 100101, People's Republic of China.

Action representation of manipulable objects has been found to be involved in object recognition. Recently, studies have indicated the existence of two distinct action systems: functional action specifying how to use an object and structural action concerning how to grasp an object. Despite evidence revealing the systems' anatomical and functional differences, few preceding studies have dissociated their respective roles in object recognition. Read More

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http://dx.doi.org/10.1007/s00221-018-5426-9DOI Listing
November 2018

Handedness modulates proprioceptive drift in the rubber hand illusion.

Exp Brain Res 2018 Nov 8. Epub 2018 Nov 8.

University of Queensland, Brisbane, Australia.

Preference for use of either the left or right hand ('handedness') has been linked with modulations of perception and sensory processing-both of space and the body. Here we ask whether multisensory integration of bodily information also varies as a function of handedness. We created a spatial disparity between visual and somatosensory hand position information using the rubber hand illusion, and use the magnitude of illusory shifts in hand position (proprioceptive 'drift') as a tool to probe the weighted integration of multisensory information. Read More

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http://link.springer.com/10.1007/s00221-018-5391-3
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http://dx.doi.org/10.1007/s00221-018-5391-3DOI Listing
November 2018
11 Reads

Selective resetting position and heading estimations while driving in a large-scale immersive virtual environment.

Exp Brain Res 2018 Nov 8. Epub 2018 Nov 8.

Department of Psychology, University of Alberta, P217 Biological Sciences Bldg, Edmonton, AB, T6G 2E9, Canada.

Two experiments investigated how self-motion cues and landmarks interact in determining a human's position and heading estimations while driving in a large-scale virtual environment by controlling a gaming wheel and pedals. In an immersive virtual city, participants learned the locations of five buildings in the presence of two proximal towers and four distal scenes. Then participants drove two streets without viewing these buildings, towers, or scenes. Read More

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http://link.springer.com/10.1007/s00221-018-5417-x
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http://dx.doi.org/10.1007/s00221-018-5417-xDOI Listing
November 2018
2 Reads
2.040 Impact Factor

Increased center of pressure trajectory of the finger during precision grip task in stroke patients.

Exp Brain Res 2018 Nov 7. Epub 2018 Nov 7.

Gunma University Graduate School of Health Sciences, 3-39-22, Showa, Maebashi, Gunma, 371-8514, Japan.

The aim of this study was to assess the spatial stability of stroke patients while holding a freely movable object. Twenty-two acute stroke patients with mild hand impairment performed a grip and lift task using the thumb and index finger. The displacement of the center of pressure (COP) trajectory, the grip force (GF) and several clinical parameters were monitored. Read More

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http://dx.doi.org/10.1007/s00221-018-5425-xDOI Listing
November 2018

Local dynamic stability in temporal pattern of intersegmental coordination during various stride time and stride length combinations.

Exp Brain Res 2018 Nov 2. Epub 2018 Nov 2.

Laboratory of Neurophysiology, Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-nihonamatsu, Sakyo-ku, Kyoto, Kyoto, 606-8501, Japan.

For the regulation of walking speed, the central nervous system must select appropriate combinations of stride time and stride length (stride time-length combinations) and coordinate many joints or segments in the whole body. However, humans achieve both appropriate selection of stride time-length combinations and effortless coordination of joints or segments. Although this selection of stride time-length combination has been explained by minimized energy cost, it may also be explained by the stability of kinematic coordination. Read More

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http://link.springer.com/10.1007/s00221-018-5422-0
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http://dx.doi.org/10.1007/s00221-018-5422-0DOI Listing
November 2018
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Solo versus joint bimanual coordination.

Exp Brain Res 2018 Nov 2. Epub 2018 Nov 2.

Royal Holloway University of London, Egham, UK.

Understanding the differences between solo and joint action control is an important goal in psychology. The present study represented a novel approach in which participants performed a bimanual finger oscillation task, either alone or in pairs. It was hypothesized that performance of this task relies heavily on attention and utilizes two independent processes that differentially affect solo and joint performance. Read More

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http://link.springer.com/10.1007/s00221-018-5420-2
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http://dx.doi.org/10.1007/s00221-018-5420-2DOI Listing
November 2018
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"1.5 Dissociation" of somatoparaphrenia for the upper limb and neglect for the lower limb following a thalamic stroke presenting as flaccid hemiparesis: rehabilitation applications and neuroscience implications.

Exp Brain Res 2018 Nov 2. Epub 2018 Nov 2.

Department of Physical Medicine and Rehabilitation, Metropolitan Hospital, 1901 First Avenue, New York, NY, 10029, USA.

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http://dx.doi.org/10.1007/s00221-018-5406-0DOI Listing
November 2018

Searching for the inner self: evidence against a direct dependence of the self-prioritization effect on the ventro-medial prefrontal cortex.

Exp Brain Res 2018 Oct 31. Epub 2018 Oct 31.

Department of Cognitive Psychology and Statistics, University of Trier, 54286, Trier, Germany.

The processing of self-referential material is supposed to be located in the medial prefrontal cortex (MPFC) and in particular in the ventro-medial prefrontal cortex (VMPFC). A reliable method to assess effects of self-relevance is the so-called matching paradigm in which the prioritization of newly learned self-associations in comparison to non-self-relevant associations can be measured. To assess the connection of activation in the VMPFC and self-referential processing, we measured the self-prioritization effect (SPE) before and after experimentally manipulating activation in the VMPFC. Read More

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http://dx.doi.org/10.1007/s00221-018-5413-1DOI Listing
October 2018

Muscular effort differentially mediates perception of heaviness and length via dynamic touch.

Exp Brain Res 2018 Oct 31. Epub 2018 Oct 31.

Department of Kinesiology, University of Georgia, Athens, GA, USA.

Our ability to perceive properties of handheld objects (e.g., heaviness, orientation, length, width, and shape) by wielding via dynamic touch is crucial for tooling and other forms of object manipulation-activities that are the basis of much human experience. Read More

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http://link.springer.com/10.1007/s00221-018-5421-1
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http://dx.doi.org/10.1007/s00221-018-5421-1DOI Listing
October 2018
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Age differences in arm-trunk coordination during trunk-assisted reaching.

Exp Brain Res 2018 Oct 30. Epub 2018 Oct 30.

School of Human Kinetics, University of Ottawa, 125 University, Ottawa, ON, K1N 6N5, Canada.

Reaching for an object is a basic motor skill that requires precise coordination between elbow, shoulder and trunk motion. The purpose of this research study was to examine age-related differences in compensatory arm-trunk coordination during trunk-assisted reaching. To engage the arm and trunk, an older and younger group of participants were asked to (1) maintain a fixed hand position while flexing forward at the trunk [stationary hand task (SHT)] and (2) reach to a within-arm's reach target while simultaneously flexing forward at the trunk [reaching hand task (RHT)] (Raptis et al. Read More

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http://dx.doi.org/10.1007/s00221-018-5412-2DOI Listing
October 2018
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Voluntary and electrically-induced muscle fatigue differently affect postural control mechanisms in unipedal stance.

Exp Brain Res 2018 Oct 30. Epub 2018 Oct 30.

Département STAPS, Laboratoire Mouvement, Equilibre, Performance et Santé (UPRES EA 4445), Université de Pau et des Pays de l'Adour, ZA Bastillac Sud, 65000, Tarbes, France.

The repetition of muscle contractions is likely to generate fatigue which can provoke alterations of postural control. Regulatory mechanisms can be triggered to counteract these alterations. However, these mechanisms would occur only when fatigue is induced through voluntary (VOL) contractions and not with electrically stimulated (ES) contractions. Read More

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http://link.springer.com/10.1007/s00221-018-5418-9
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http://dx.doi.org/10.1007/s00221-018-5418-9DOI Listing
October 2018
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Cognitive load and emotional processing in psoriasis: a thermal imaging study.

Exp Brain Res 2018 Oct 29. Epub 2018 Oct 29.

Department of Psychology, Sapienza University of Rome, Via dei Marsi, 78, 00185, Rome, Italy.

Psoriasis is a chronic dermatologic disease which is frequently associated with psychological distress. Although studies suggest a relationship between this condition and difficulties in emotion regulation, behavioral and physiological evidence about this link is scarce. We measured implicit emotion regulation abilities of psoriasis patients and a healthy control group by examining the impact of distracting emotional (positive, negative or neutral) images on a working memory task ("Emotional N-Back") which could present high (2-back) or low (1-back) cognitive workload. Read More

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http://link.springer.com/10.1007/s00221-018-5416-y
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http://dx.doi.org/10.1007/s00221-018-5416-yDOI Listing
October 2018
2 Reads

Touch-induced pupil size reflects stimulus intensity, not subjective pleasantness.

Exp Brain Res 2018 Oct 29. Epub 2018 Oct 29.

Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, The Netherlands.

Interpersonal touch is known to influence human communication and emotion. An important system for interpersonal touch is the C-tactile (CT) system, which is activated by a soft stroke on hairy skin with a velocity of 1-10 cms. This system been proposed to play a unique role in hedonic valence and emotion of touch. Read More

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http://dx.doi.org/10.1007/s00221-018-5404-2DOI Listing
October 2018

Virtual auditory aperture passability.

Exp Brain Res 2018 Oct 29. Epub 2018 Oct 29.

University of Cincinnati, Cincinnati, USA.

Two experiments investigated (1) the ability of individuals to perceive the passability of apertures that are constructed using two virtual sounds sources and (2) the nature of the perceptual information that is used when determining passability in such a way. In the first experiment, participants judged whether they could successfully walk between two sound sources, heard through headphones, without turning their shoulders. We hypothesized that judgements would be accurate and driven by the detection of a proposed informational variable that relates head rotation, forward locomotion and aperture width. Read More

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http://dx.doi.org/10.1007/s00221-018-5407-zDOI Listing
October 2018

The impact of maternal separation and isolation stress during stress hyporesponsive period on fear retention and extinction recall memory from 5-week- to 1-year-old rats.

Exp Brain Res 2018 Oct 29. Epub 2018 Oct 29.

Department of Neurophysiology, National Institute of Mental Health and Neurosciences (NIMHANS), Hosur Road, P.B. No. 2900, Bengaluru, Karnataka, 560 029, India.

The purpose of the present study was to determine whether age would disrupt fear retention and extinction memory in rats pre-exposed to maternal separation and isolation stress; these rats are called MS rats. MS stress was induced by exposing rat pups into maternal separation followed by isolation stress from peer groups (MS) daily/6 h during stress hyporesponsive period, while controls rats that were undisturbed during this period are called NMS rats. 5, 8, 15 and 52 weeks later, these animals were exposed to classical fear conditioning test by pairing auditory stimulus (conditioned stimulus, CS+) with electric footshock. Read More

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http://link.springer.com/10.1007/s00221-018-5411-3
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http://dx.doi.org/10.1007/s00221-018-5411-3DOI Listing
October 2018
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Anticipatory and compensatory postural adjustments in response to loading perturbation of unknown magnitude.

Authors:
Lin Xie Jian Wang

Exp Brain Res 2018 Oct 27. Epub 2018 Oct 27.

Institute of Sports Science and Technology, Zhejiang University, Hangzhou, 310028, China.

In response to sudden postural perturbations, the posture control system uses anticipatory and compensatory postural adjustments (APAs and CPAs) to maintain balance and equilibrium. APAs strengthen as the perturbation magnitude increases, while CPAs remain constant because APAs make the necessary adjustments. However, the magnitude of a postural perturbation cannot always be fully known. Read More

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http://link.springer.com/10.1007/s00221-018-5397-x
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http://dx.doi.org/10.1007/s00221-018-5397-xDOI Listing
October 2018
7 Reads

Correction to: Role of astrocytic MeCP2 in regulation of CNS myelination by affecting oligodendrocyte and neuronal physiology and axo-glial interactions.

Exp Brain Res 2018 Nov;236(11):3029

Division of Neurobiology, Department of Zoology, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India.

In the typesetting of the original version of this article, the Publisher inadvertently confused the first and last names of the authors, leading to their misrepresentation in PubMed. Read More

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http://dx.doi.org/10.1007/s00221-018-5415-zDOI Listing
November 2018

Comparison of ion channel inhibitor combinations for limiting secondary degeneration following partial optic nerve transection.

Exp Brain Res 2018 Oct 26. Epub 2018 Oct 26.

Experimental and Regenerative Neurosciences, School of Biological Sciences, The University of Western Australia, 35 Stirling Hwy, Perth, WA, 6009, Australia.

Following neurotrauma, secondary degeneration of neurons and glia adjacent to the injury leads to further functional loss. A combination of ion channel inhibitors (lomerizine + oxATP + YM872) has been shown to be effective at limiting structural and functional loss due to secondary degeneration. Here we assess efficacy of the combination where oxATP is replaced with Brilliant Blue G (BBG), a more clinically applicable P2X receptor inhibitor. Read More

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http://link.springer.com/10.1007/s00221-018-5414-0
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http://dx.doi.org/10.1007/s00221-018-5414-0DOI Listing
October 2018
5 Reads