91 results match your criteria Visual-Haptic Interfaces Modification of Motor and Cognitive Performance


Visual-Haptic Size Estimation in Peripersonal Space.

Front Neurorobot 2020 16;14:18. Epub 2020 Apr 16.

Human-Computer Interaction, Department of Informatics, Universität Hamburg, Hamburg, Germany.

In perceptual psychology, estimations of visual depth and size under different spatial layouts have been extensively studied. However, research evidence in virtual environments (VE) is relatively lacking. The emergence of human-computer interaction (HCI) and virtual reality (VR) has raised the question of how human operators perform actions based on the estimation of visual properties in VR, especially when the sensory cues associated with the same object are conflicting. Read More

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http://dx.doi.org/10.3389/fnbot.2020.00018DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7177043PMC

Task-Irrelevant Sound Corrects Leftward Spatial Bias in Blindfolded Haptic Placement Task.

Multisens Res 2019 Jan 1:1-28. Epub 2019 Jan 1.

California Polytechnic State University, San Luis Obispo, CA,USA.

We often rely on our sense of vision for understanding the spatial location of objects around us. If vision cannot be used, one must rely on other senses, such as hearing and touch, in order to build spatial representations. Previous work has found evidence of a leftward spatial bias in visual and tactile tasks. Read More

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http://dx.doi.org/10.1163/22134808-20191387DOI Listing
January 2019

A visual-haptic neurofeedback training improves sensorimotor cortical activations and BCI performance.

Conf Proc IEEE Eng Med Biol Soc 2019 Jul;2019:6335-6338

Neurofeedback training (NFT) could provide a novel way to investigate or restore the impaired brain function and neuroplasticity. However, it remains unclear how much the different feedback modes can contribute to NFT training. Specifically, whether they can enhance the cortical activations for motor training. Read More

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http://dx.doi.org/10.1109/EMBC.2019.8856389DOI Listing

Neural Efficiency of Human-Robotic Feedback Modalities Under Stress Differs With Gender.

Front Hum Neurosci 2019 30;13:287. Epub 2019 Aug 30.

Department of Mechanical Engineering, Texas A&M University, College Station, TX, United States.

Sensory feedback, which can be presented in different modalities - single and combined, aids task performance in human-robotic interaction (HRI). However, combining feedback modalities does not always lead to optimal performance. Indeed, it is not known how feedback modalities affect operator performance under stress. Read More

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http://dx.doi.org/10.3389/fnhum.2019.00287DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6729110PMC
August 2019
3 Reads

Can multisensory training aid visual learning? A computational investigation.

J Vis 2019 09;19(11)

Department of Computer Science, University of Rochester, Rochester, NY, USA.

Although real-world environments are often multisensory, visual scientists typically study visual learning in unisensory environments containing visual signals only. Here, we use deep or artificial neural networks to address the question, Can multisensory training aid visual learning? We examine a network's internal representations of objects based on visual signals in two conditions: (a) when the network is initially trained with both visual and haptic signals, and (b) when it is initially trained with visual signals only. Our results demonstrate that a network trained in a visual-haptic environment (in which visual, but not haptic, signals are orientation-dependent) tends to learn visual representations containing useful abstractions, such as the categorical structure of objects, and also learns representations that are less sensitive to imaging parameters, such as viewpoint or orientation, that are irrelevant for object recognition or classification tasks. Read More

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http://dx.doi.org/10.1167/19.11.1DOI Listing
September 2019
3 Reads

A BCI based visual-haptic neurofeedback training improves cortical activations and classification performance during motor imagery.

J Neural Eng 2019 10 23;16(6):066012. Epub 2019 Oct 23.

Department of Biomedical Engineering, College of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin 300072, People's Republic of China.

Objective: We proposed a brain-computer interface (BCI) based visual-haptic neurofeedback training (NFT) by incorporating synchronous visual scene and proprioceptive electrical stimulation feedback. The goal of this work was to improve sensorimotor cortical activations and classification performance during motor imagery (MI). In addition, their correlations and brain network patterns were also investigated respectively. Read More

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http://dx.doi.org/10.1088/1741-2552/ab377dDOI Listing
October 2019
6 Reads

The Effect of Ageing on Optimal Integration of Conflicting and Non-Conflicting Visual-Haptic Stimuli.

Multisens Res 2019 Jan 1:1-26. Epub 2019 Jan 1.

2Division of Neuroscience and Experimental Psychology, Faculty of Biology, Medicine and Health, University of Manchester, UK.

Multisensory integration typically follows the predictions of a statistically optimal model whereby the contribution of each sensory modality is weighted according to its reliability. Previous research has shown that multisensory integration is affected by ageing, however it is less certain whether older adults follow this statistically optimal model. Additionally, previous studies often present multisensory cues which are conflicting in size, shape or location, yet naturally occurring multisensory cues are usually non-conflicting. Read More

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http://dx.doi.org/10.1163/22134808-20191409DOI Listing
January 2019
5 Reads

Frozen-thawed Abdominal Flap Remnant as an education material for a Medium Group Surgical Skills Education Workshop.

Ann Surg Treat Res 2019 Feb 30;96(2):53-57. Epub 2018 Jan 30.

Department of Plastic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.

Purpose: Residents' duty-hour regulations and the evolution of minimally invasive surgical techniques require more effective and efficient surgical skill teaching models. We used frozen-thawed human tissue remnants harvested during abdominoplasty or abdominal tissue-based breast reconstruction to allow for a medium-sized group workshop program, simulating a realistic surgical environment and visual/haptic feedback.

Methods: Full-thickness abdominal tissue (skin and subcutaneous fat) were donated from patients who underwent autologous breast reconstruction and gave consent to use their tissue for comprehensive research and medical educational purposes. Read More

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http://dx.doi.org/10.4174/astr.2019.96.2.53DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6358597PMC
February 2019
9 Reads

Does gesture strengthen sensorimotor knowledge of objects? The case of the size-weight illusion.

Psychol Res 2020 Jun 14;84(4):966-980. Epub 2018 Dec 14.

Department of Psychology, Education and Child Studies, Erasmus University Rotterdam, 3000 DR, Rotterdam, The Netherlands.

Co-speech gestures have been proposed to strengthen sensorimotor knowledge related to objects' weight and manipulability. This pre-registered study (https://www.osf. Read More

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http://dx.doi.org/10.1007/s00426-018-1128-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7239830PMC
June 2020
5 Reads

How does ageing affect grasp adaptation to a visual-haptic size conflict?

Exp Brain Res 2018 08 23;236(8):2173-2184. Epub 2018 May 23.

Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Zochonis Building, Oxford Road, M13 9PL, Manchester, UK.

Previous research suggests that the ability to adapt motor behaviour to sudden environmental changes may be impaired in older adults. Here, we investigated whether the adaptation of grasping behaviour in response to a visual-haptic size conflict is also affected by increasing age. 30 older and 18 young adults were instructed to grasp a hidden block whilst viewing a second block in a congruent position. Read More

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http://dx.doi.org/10.1007/s00221-018-5288-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6061465PMC
August 2018
6 Reads

NotifiVR: Exploring Interruptions and Notifications in Virtual Reality.

IEEE Trans Vis Comput Graph 2018 04;24(4):1447-1456

The proliferation of high resolution and affordable virtual reality (VR) headsets is quickly making room-scale VR experiences available in our homes. Most VR experiences strive to achieve complete immersion by creating a disconnect from the real world. However, due to the lack of a standardized notification management system and minimal context awareness in VR, an immersed user may face certain situations such as missing an important phone call (digital scenario), tripping over wandering pets (physical scenario), or losing track of time (temporal scenario). Read More

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http://dx.doi.org/10.1109/TVCG.2018.2793698DOI Listing
April 2018
8 Reads

On the origin of body-related influences on visual perception.

J Exp Psychol Hum Percept Perform 2017 06 6;43(6):1222-1237. Epub 2017 Apr 6.

Department of Psychology, University of Würzburg.

The human body and the potential to move it affect the way we perceive the world. Here we explored a possible origin of such action-specific effects on perception. Participants were asked to enclose a virtual object by movements of their index finger and thumb and judged either the actual finger-thumb distance or the size of the virtual object subsequently. Read More

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http://dx.doi.org/10.1037/xhp0000358DOI Listing
June 2017
9 Reads

Assessing a continuum of lexical-semantic knowledge in the second year of life: A multimodal approach.

J Exp Child Psychol 2017 06 24;158:95-111. Epub 2017 Feb 24.

Department of Psychology, San Diego State University, San Diego, CA 92182, USA.

Behavioral dissociations in young children's visual and haptic responses have been taken as evidence that word knowledge is not all-or-none but instead exists on a continuum from absence of knowledge, to partial knowledge, to robust knowledge. This longitudinal study tested a group of 16- to 18-month-olds, 6months after their initial visit, to replicate results of partial understanding as shown by visual-haptic dissociations and to determine whether partial knowledge of word-referent relations can be leveraged for future word recognition. Results show that, like 16-month-olds, 22-month-olds demonstrate behavioral dissociations exhibited by rapid visual reaction times to a named referent but incorrect haptic responses. Read More

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http://dx.doi.org/10.1016/j.jecp.2017.01.003DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5669052PMC
June 2017
14 Reads

Optimal visual-haptic integration with articulated tools.

Exp Brain Res 2017 05 18;235(5):1361-1373. Epub 2017 Feb 18.

Wolfson Centre for Cognitive Neuroscience, School of Psychology, Bangor University, Penrallt Rd., Bangor, Gwynedd, LL57 2AS, UK.

When we feel and see an object, the nervous system integrates visual and haptic information optimally, exploiting the redundancy in multiple signals to estimate properties more precisely than is possible from either signal alone. We examined whether optimal integration is similarly achieved when using articulated tools. Such tools (tongs, pliers, etc) are a defining characteristic of human hand function, but complicate the classical sensory 'correspondence problem' underlying multisensory integration. Read More

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http://dx.doi.org/10.1007/s00221-017-4896-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5380699PMC
May 2017
14 Reads

Shifty: A Weight-Shifting Dynamic Passive Haptic Proxy to Enhance Object Perception in Virtual Reality.

IEEE Trans Vis Comput Graph 2017 04 25;23(4):1285-1294. Epub 2017 Jan 25.

We define the concept of Dynamic Passive Haptic Feedback (DPHF) for virtual reality by introducing the weight-shifting physical DPHF proxy object Shifty. This concept combines actuators known from active haptics and physical proxies known from passive haptics to construct proxies that automatically adapt their passive haptic feedback. We describe the concept behind our ungrounded weight-shifting DPHF proxy Shifty and the implementation of our prototype. Read More

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http://dx.doi.org/10.1109/TVCG.2017.2656978DOI Listing
April 2017
8 Reads

Similarities in Autistic and Neurotypical Visual-Haptic Perception When Making Judgements About Conflicting Sensory Stimuli.

Multisens Res 2017 Jan 1;30(6):509-536. Epub 2017 Jan 1.

Division of Neuroscience and Experimental Psychology, University of Manchester, Oxford Road, M139PL, UK.

A number of studies have shown that multisensory performance is well predicted by a statistically optimal maximum likelihood estimation (MLE) model. Under this model unisensory estimates are combined additively and weighted according to relative reliability. Recent theories have proposed that atypical sensation and perception commonly reported in autism spectrum condition (ASC) may result from differences in the use of reliability information. Read More

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http://dx.doi.org/10.1163/22134808-00002551DOI Listing
January 2017
5 Reads

Tele-rehabilitation using in-house wearable ankle rehabilitation robot.

Assist Technol 2018 30;30(1):24-33. Epub 2016 Sep 30.

d Department of Mechanical Engineering , The University of Auckland , Auckland , New Zealand.

This article explores wide-ranging potential of the wearable ankle robot for in-house rehabilitation. The presented robot has been conceptualized following a brief analysis of the existing technologies, systems, and solutions for in-house physical ankle rehabilitation. Configuration design analysis and component selection for ankle robot have been discussed as part of the conceptual design. Read More

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http://dx.doi.org/10.1080/10400435.2016.1230153DOI Listing
September 2019
15 Reads

Objective Assessment of Laparoscopic Force and Psychomotor Skills in a Novel Virtual Reality-Based Haptic Simulator.

J Surg Educ 2016 Sep-Oct;73(5):858-69. Epub 2016 Jun 3.

Institute of Surgical Gastroenterology, Madras Medical College and Rajiv Gandhi Government General Hospital, Chennai, Tamil Nadu, India.

Background: Most of the commercially available virtual reality-based laparoscopic simulators do not effectively evaluate combined psychomotor and force-based laparoscopic skills. Consequently, the lack of training on these critical skills leads to intraoperative errors.

Objectives: To assess the effectiveness of the novel virtual reality-based simulator, this study analyzed the combined psychomotor (i. Read More

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http://dx.doi.org/10.1016/j.jsurg.2016.04.009DOI Listing
March 2017
13 Reads

Haptic over visual information in the distribution of visual attention after tool-use in near and far space.

Exp Brain Res 2015 Oct 1;233(10):2977-88. Epub 2015 Jul 1.

Department of Psychology, Claremont Graduate University, Claremont, CA, USA.

Despite attentional prioritization for grasping space near the hands, tool-use appears to transfer attentional bias to the tool's end/functional part. The contributions of haptic and visual inputs to attentional distribution along a tool were investigated as a function of tool-use in near (Experiment 1) and far (Experiment 2) space. Visual attention was assessed with a 50/50, go/no-go, target discrimination task, while a tool was held next to targets appearing near the tool-occupied hand or tool-end. Read More

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http://dx.doi.org/10.1007/s00221-015-4368-8DOI Listing
October 2015
24 Reads

An anatomical and psychophysical comparison of subjective verticals in patients with right brain damage.

Cortex 2015 Aug 23;69:60-7. Epub 2015 Apr 23.

Neurology and Imaging of Cognition Laboratory, University of Geneva, Geneva, Switzerland; Department of Neurology, Geneva University Hospitals, Geneva, Switzerland.

Introduction: Brain hemisphere lesions often cause a contralesional tilt of the subjective vertical (SV) a phenomenon related to spatial neglect and postural disorders. Depending on the method employed, different perceptual systems come into play when this gravitational vertical is assessed. Here, we compared the anatomical and psychophysical characteristics of modality-dependent SV biases in patients with right hemisphere stroke. Read More

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http://dx.doi.org/10.1016/j.cortex.2015.04.004DOI Listing
August 2015
11 Reads

Visual attention in a visual-haptic, cross-modal matching task in children and adults.

Authors:
Carol Ann Coté

Percept Mot Skills 2015 Apr 14;120(2):381-96. Epub 2015 Apr 14.

1 The University of Scranton.

Visual fixation patterns were analyzed to gain insight into developmental changes in attention allocation in a cross-modal task. Two patterns that have been associated with increased task difficulty, gaze aversion and fixation duration, were recorded using an eye-tracker. In this exploratory study, 37 elementary age children (M age 7-10 yr. Read More

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http://dx.doi.org/10.2466/22.PMS.120v13x9DOI Listing
April 2015
24 Reads

Visual, haptic and bimodal scene perception: evidence for a unitary representation.

Cognition 2015 May 25;138:132-47. Epub 2015 Feb 25.

University of Delaware, USA.

Participants studied seven meaningful scene-regions bordered by removable boundaries (30s each). In Experiment 1 (N = 80) participants used visual or haptic exploration and then minutes later, reconstructed boundary position using the same or the alternate modality. Participants in all groups shifted boundary placement outward (boundary extension), but visual study yielded the greater error. Read More

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http://dx.doi.org/10.1016/j.cognition.2015.01.010DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4551396PMC
May 2015
21 Reads

Differential roles of delay-period neural activity in the monkey dorsolateral prefrontal cortex in visual-haptic crossmodal working memory.

Proc Natl Acad Sci U S A 2015 Jan 24;112(2):E214-9. Epub 2014 Dec 24.

Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, CA 90024.

Previous studies have shown that neurons of monkey dorsolateral prefrontal cortex (DLPFC) integrate information across modalities and maintain it throughout the delay period of working-memory (WM) tasks. However, the mechanisms of this temporal integration in the DLPFC are still poorly understood. In the present study, to further elucidate the role of the DLPFC in crossmodal WM, we trained monkeys to perform visuo-haptic (VH) crossmodal and haptic-haptic (HH) unimodal WM tasks. Read More

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http://dx.doi.org/10.1073/pnas.1410130112DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4299181PMC
January 2015
29 Reads

Infants born preterm demonstrate impaired object exploration behaviors throughout infancy and toddlerhood.

Phys Ther 2015 Jan 28;95(1):51-64. Epub 2014 Aug 28.

J.C. Galloway, PT, PhD, Department of Physical Therapy, University of Delaware.

Background: Object exploration behaviors form the foundation for future global development, but little is known about how these behaviors are exhibited by infants born preterm.

Objective: The study objective was to longitudinally compare a comprehensive set of object exploration behaviors in infants born preterm and infants born full-term from infancy into toddlerhood.

Design: Twenty-two infants born full-term and 28 infants born preterm were monitored as they interacted with objects throughout their first 2 years. Read More

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http://dx.doi.org/10.2522/ptj.20130584DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4295084PMC
January 2015
29 Reads

Toward adaptive VR simulators combining visual, haptic, and brain-computer interfaces.

IEEE Comput Graph Appl 2013 Sep-Oct;33(5):18-23

The next generation of VR simulators could take into account a novel input: the user's mental state, as measured with electrodes and a brain-computer interface. One illustration of this promising path is a project that adapted a guidance system's force feedback to the user's mental workload in real time. A first application of this approach is a medical training simulator that provides virtual assistance that adapts to the trainee's mental activity. Read More

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http://dx.doi.org/10.1109/MCG.2013.80DOI Listing
September 2015
8 Reads

Short-term plasticity of visuo-haptic object recognition.

Front Psychol 2014 2;5:274. Epub 2014 Apr 2.

Danish Research Centre for Magnetic Resonance, Copenhagen University Hospital Hvidovre Hvidovre, Denmark ; NeuroImageNord/Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf Hamburg, Germany ; Department of Neurology, Christian-Albrechts-University Kiel, Germany.

Functional magnetic resonance imaging (fMRI) studies have provided ample evidence for the involvement of the lateral occipital cortex (LO), fusiform gyrus (FG), and intraparietal sulcus (IPS) in visuo-haptic object integration. Here we applied 30 min of sham (non-effective) or real offline 1 Hz repetitive transcranial magnetic stimulation (rTMS) to perturb neural processing in left LO immediately before subjects performed a visuo-haptic delayed-match-to-sample task during fMRI. In this task, subjects had to match sample (S1) and target (S2) objects presented sequentially within or across vision and/or haptics in both directions (visual-haptic or haptic-visual) and decide whether or not S1 and S2 were the same objects. Read More

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http://dx.doi.org/10.3389/fpsyg.2014.00274DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3980106PMC
April 2014
11 Reads

Again, knowledge of common source fails to promote visual-haptic integration.

Percept Mot Skills 2014 Feb;118(1):183-94

The present study tested whether knowledge of a common source of conflicting visual-haptic stimulation promotes intersensory integration. 40 undergraduates manually felt the size of a square while viewing it through a lens that minified its visual size by half. Participants, however, could experience the haptic and the visual stimulation as emanating from either a common source or different sources. Read More

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http://journals.sagepub.com/doi/10.2466/24.23.PMS.118k11w0
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http://dx.doi.org/10.2466/24.23.PMS.118k11w0DOI Listing
February 2014
14 Reads

Visual-haptic integration with pliers and tongs: signal "weights" take account of changes in haptic sensitivity caused by different tools.

Front Psychol 2014 14;5:109. Epub 2014 Feb 14.

Wolfson Centre for Cognitive Neuroscience, School of Psychology, Bangor University Bangor, UK.

When we hold an object while looking at it, estimates from visual and haptic cues to size are combined in a statistically optimal fashion, whereby the "weight" given to each signal reflects their relative reliabilities. This allows object properties to be estimated more precisely than would otherwise be possible. Tools such as pliers and tongs systematically perturb the mapping between object size and the hand opening. Read More

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http://journal.frontiersin.org/article/10.3389/fpsyg.2014.00
Publisher Site
http://dx.doi.org/10.3389/fpsyg.2014.00109DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3924038PMC
March 2014
23 Reads

Touch influences visual perception with a tight orientation-tuning.

PLoS One 2013 14;8(11):e79558. Epub 2013 Nov 14.

Department of Cognitive Psychology, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.

Stimuli from different sensory modalities are thought to be processed initially in distinct unisensory brain areas prior to convergence in multisensory areas. However, signals in one modality can influence the processing of signals from other modalities and recent studies suggest this cross-modal influence may occur early on, even in 'unisensory' areas. Some recent psychophysical studies have shown specific cross-modal effects between touch and vision during binocular rivalry, but these cannot completely rule out a response bias. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0079558PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3828350PMC
November 2014
21 Reads

Happiness takes you right: the effect of emotional stimuli on line bisection.

Cogn Emot 2014 21;28(2):325-44. Epub 2013 Aug 21.

a Department of Psychology , University of Milano-Bicocca , Milano , Italy.

Emotion recognition is mediated by a complex network of cortical and subcortical areas, with the two hemispheres likely being differently involved in processing positive and negative emotions. As results on valence-dependent hemispheric specialisation are quite inconsistent, we carried out three experiments with emotional stimuli with a task being sensitive to measure specific hemispheric processing. Participants were required to bisect visual lines that were delimited by emotional face flankers, or to haptically bisect rods while concurrently listening to emotional vocal expressions. Read More

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http://dx.doi.org/10.1080/02699931.2013.824871DOI Listing
November 2014
38 Reads

Effects of visual information regarding allocentric processing in haptic parallelity matching.

Acta Psychol (Amst) 2013 Oct 10;144(2):352-60. Epub 2013 Aug 10.

Faculty of Psychology and Neuroscience, Department of Cognitive Neuroscience, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands. Electronic address:

Research has revealed that haptic perception of parallelity deviates from physical reality. Large and systematic deviations have been found in haptic parallelity matching most likely due to the influence of the hand-centered egocentric reference frame. Providing information that increases the influence of allocentric processing has been shown to improve performance on haptic matching. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S00016918130015
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http://dx.doi.org/10.1016/j.actpsy.2013.07.003DOI Listing
October 2013
9 Reads

Modulation of visually evoked postural responses by contextual visual, haptic and auditory information: a 'virtual reality check'.

PLoS One 2013 28;8(6):e67651. Epub 2013 Jun 28.

Department of Experimental Psychology, Liverpool University, Liverpool, United Kingdom.

Externally generated visual motion signals can cause the illusion of self-motion in space (vection) and corresponding visually evoked postural responses (VEPR). These VEPRs are not simple responses to optokinetic stimulation, but are modulated by the configuration of the environment. The aim of this paper is to explore what factors modulate VEPRs in a high quality virtual reality (VR) environment where real and virtual foreground objects served as static visual, auditory and haptic reference points. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0067651PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3695920PMC
April 2014
34 Reads

Micro-to-nano biomechanical modeling for assisted biological cell injection.

IEEE Trans Biomed Eng 2013 Sep 15;60(9):2461-71. Epub 2013 Apr 15.

LIRIS laboratory and IPNL laboratory CNRS, Universite Claude Bernard Lyon 1, Villeurbanne 69100, France.

To facilitate training of biological cell injection operations, we are developing an interactive virtual environment to simulate needle insertion into biological cells. This paper presents methodologies for dynamic modeling, visual/haptic display, and model validation of cell injection. We first investigate the challenging issues in the modeling of the biomechanical properties of living cells. Read More

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http://dx.doi.org/10.1109/TBME.2013.2258155DOI Listing
September 2013
12 Reads

Crossmodal interactions of haptic and visual texture information in early sensory cortex.

Neuroimage 2013 Jul 16;75:123-135. Epub 2013 Mar 16.

Department of Cognitive Neuroscience, Maastricht University, The Netherlands; Brain Innovation B.V., Maastricht, The Netherlands; Netherlands Institute for Neuroscience, Institute of the Royal Netherlands Academy of Arts and Sciences (KNAW), Amsterdam, The Netherlands.

Both visual and haptic information add to the perception of surface texture. While prior studies have reported crossmodal interactions of both sensory modalities at the behavioral level, neuroimaging studies primarily investigated texture perception in separate visual and haptic paradigms. These experimental designs, however, only allowed to identify overlap in both sensory processing streams but no interaction of visual and haptic texture processing. Read More

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http://dx.doi.org/10.1016/j.neuroimage.2013.02.075DOI Listing
July 2013
11 Reads

Roughness perception of unfamiliar dot pattern textures.

Acta Psychol (Amst) 2013 May 20;143(1):20-34. Epub 2013 Mar 20.

Maastricht University, Department of Cognitive Neuroscience, 6229 ER Maastricht, The Netherlands.

Both vision and touch yield comparable results in terms of roughness estimation of familiar textures as was shown in earlier studies. To our knowledge, no research has been conducted on the effect of sensory familiarity with the stimulus material on roughness estimation of unfamiliar textures. The influence of sensory modality and familiarity on roughness perception of dot pattern textures was investigated in a series of five experiments. Read More

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http://dx.doi.org/10.1016/j.actpsy.2013.02.002DOI Listing
May 2013
23 Reads

Learning different light prior distributions for different contexts.

Cognition 2013 Apr 30;127(1):99-104. Epub 2013 Jan 30.

Psychology, University of Southampton, Southampton SO17 1BJ, UK.

The pattern of shading across an image can provide a rich sense of object shape. Our ability to use shading information is remarkable given the infinite possible combinations of illumination, shape and reflectance that could have produced any given image. Illumination can change dramatically across environments (e. Read More

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http://dx.doi.org/10.1016/j.cognition.2012.12.011DOI Listing
April 2013
10 Reads

Transfer of object category knowledge across visual and haptic modalities: experimental and computational studies.

Cognition 2013 Feb 25;126(2):135-48. Epub 2012 Oct 25.

Department of Brain and Cognitive Sciences, University of Rochester, Rochester, NY 14627, United States.

We study people's abilities to transfer object category knowledge across visual and haptic domains. If a person learns to categorize objects based on inputs from one sensory modality, can the person categorize these same objects when the objects are perceived through another modality? Can the person categorize novel objects from the same categories when these objects are, again, perceived through another modality? Our work makes three contributions. First, by fabricating Fribbles (3-D, multi-part objects with a categorical structure), we developed visual-haptic stimuli that are highly complex and realistic, and thus more ecologically valid than objects that are typically used in haptic or visual-haptic experiments. Read More

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http://dx.doi.org/10.1016/j.cognition.2012.08.005DOI Listing
February 2013
24 Reads

Development of visuo-auditory integration in space and time.

Front Integr Neurosci 2012 17;6:77. Epub 2012 Sep 17.

Robotics, Brain and Cognitive Sciences Department, Istituto Italiano di Tecnologia Genoa, Italy.

Adults integrate multisensory information optimally (e.g., Ernst and Banks, 2002) while children do not integrate multisensory visual-haptic cues until 8-10 years of age (e. Read More

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http://dx.doi.org/10.3389/fnint.2012.00077DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3443931PMC
October 2012
14 Reads

EMG-based visual-haptic biofeedback: a tool to improve motor control in children with primary dystonia.

IEEE Trans Neural Syst Rehabil Eng 2013 May 5;21(3):474-80. Epub 2012 Oct 5.

Bioengineering Department, Politecnico di Milano, 20133 Milano, Italy.

New insights suggest that dystonic motor impairments could also involve a deficit of sensory processing. In this framework, biofeedback, making covert physiological processes more overt, could be useful. The present work proposes an innovative integrated setup which provides the user with an electromyogram (EMG)-based visual-haptic biofeedback during upper limb movements (spiral tracking tasks), to test if augmented sensory feedbacks can induce motor control improvement in patients with primary dystonia. Read More

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http://ieeexplore.ieee.org/iel5/7333/6514123/06324447.pdf?ar
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http://ieeexplore.ieee.org/iel5/7333/4359219/06324447.pdf?ar
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http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumbe
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http://dx.doi.org/10.1109/TNSRE.2012.2222445DOI Listing
May 2013
20 Reads

The combined impact of virtual reality neurorehabilitation and its interfaces on upper extremity functional recovery in patients with chronic stroke.

Stroke 2012 Oct 7;43(10):2720-8. Epub 2012 Aug 7.

Laboratory of Synthetic Perceptive Emotive and Cognitive Systems (SPECS), Department of Technology, Universitat Pompeu Fabra, Barcelona, Spain.

Background And Purpose: Although there is strong evidence on the beneficial effects of virtual reality (VR)-based rehabilitation, it is not yet well understood how the different aspects of these systems affect recovery. Consequently, we do not exactly know what features of VR neurorehabilitation systems are decisive in conveying their beneficial effects.

Methods: To specifically address this issue, we developed 3 different configurations of the same VR-based rehabilitation system, the Rehabilitation Gaming System, using 3 different interface technologies: vision-based tracking, haptics, and a passive exoskeleton. Read More

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http://stroke.ahajournals.org/content/early/2012/08/07/STROK
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http://stroke.ahajournals.org/cgi/doi/10.1161/STROKEAHA.112.
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http://dx.doi.org/10.1161/STROKEAHA.112.653196DOI Listing
October 2012
32 Reads

Effects of an oral contraceptive containing chlormadinone acetate and ethinylestradiol on hair and skin quality in women wishing to use hormonal contraception.

J Eur Acad Dermatol Venereol 2013 May 10;27(5):601-8. Epub 2012 Mar 10.

Department of Chemistry, Division of Cosmetic Sciences, University of Hamburg, Hamburg, Germany.

Background: Skin and hair appearance is important to body image. Oily skin and oily, impaired hair quality, which can develop in women taking certain types of hormonal contraceptives, may cause psychosocial stress.

Objectives: The aim of the current study was to investigate the effects of an oral monophasic contraceptive (0. Read More

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http://dx.doi.org/10.1111/j.1468-3083.2012.04497.xDOI Listing
May 2013
5 Reads

A taste of words: linguistic context and perceptual simulation predict the modality of words.

Cogn Sci 2011 Mar 9;35(2):381-98. Epub 2010 Dec 9.

Department of Psychology/Institute for Intelligent Systems, University of Memphis, Psychology Building, Memphis, TN 38152, USA.

Previous studies have shown that object properties are processed faster when they follow properties from the same perceptual modality than properties from different modalities. These findings suggest that language activates sensorimotor processes, which, according to those studies, can only be explained by a modal account of cognition. The current paper shows how a statistical linguistic approach of word co-occurrences can also reliably predict the category of perceptual modality a word belongs to (auditory, olfactory-gustatory, visual-haptic), even though the statistical linguistic approach is less precise than the modal approach (auditory, gustatory, haptic, olfactory, visual). Read More

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http://dx.doi.org/10.1111/j.1551-6709.2010.01157.xDOI Listing
March 2011
12 Reads

Visual-haptic cue integration with spatial and temporal disparity during pointing movements.

Exp Brain Res 2011 Apr 4;210(1):67-80. Epub 2011 Mar 4.

Department of Psychology, Giessen University, Otto-Behaghel-Str. 10F, 35394 Giessen, Germany.

Many perceptual cue combination studies have shown that humans can integrate sensory information across modalities as well as within a modality in a manner that is close to optimal. While the limits of sensory cue integration have been extensively studied in the context of perceptual decision tasks, the evidence obtained in the context of motor decisions provides a less consistent picture. Here, we studied the combination of visual and haptic information in the context of human arm movement control. Read More

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http://link.springer.com/10.1007/s00221-011-2603-5
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http://dx.doi.org/10.1007/s00221-011-2603-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3400546PMC
April 2011
9 Reads

Haptics in teaching handwriting: the role of perceptual and visuo-motor skills.

Hum Mov Sci 2011 Aug 26;30(4):745-59. Epub 2011 Jan 26.

IUFM de Bretagne, 8 rue d'Avranches, 29200 Brest, France.

Two studies were carried out in order to better understand the role of perceptual and visuo-motor skills in handwriting. Two training programs, visual-haptic (VH) and visual (V), were compared which differed in the way children explored the letters. The results revealed that improvements of VH training on letter recognition and handwriting quality were higher than improvements after V training. Read More

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http://dx.doi.org/10.1016/j.humov.2010.05.015DOI Listing
August 2011
15 Reads

Perception of products by progressive multisensory integration. A study on hammers.

Appl Ergon 2011 Jul 29;42(5):652-64. Epub 2010 Oct 29.

Department of Mechanical Engineering and Construction, Avda. Sos Baynat s/n, Universitat Jaume I, Castellón, Spain.

The aim of this work is to determine the influence of multisensory (visual-haptic) integration and the level of interaction (seeing photographs, seeing the actual product, touching it and using it) on the perception of products, including perceived ergonomics. The product selected for the experiment was the hammer, as this will help to establish whether emotional design studies can also apply to 'commercial' products. Subjective opinions of users were evaluated through semantic differential tests. Read More

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http://dx.doi.org/10.1016/j.apergo.2010.09.014DOI Listing
July 2011
8 Reads

A pervasive visual-haptic framework for virtual delivery training.

IEEE Trans Inf Technol Biomed 2010 Mar;14(2):326-34

Department of Mathematics and Computer Science, University of Salerno, Salerno 84084, Italy.

Thanks to the advances of voltage regulator (VR) technologies and haptic systems, virtual simulators are increasingly becoming a viable alternative to physical simulators in medicine and surgery, though many challenges still remain. In this study, a pervasive visual-haptic framework aimed to the training of obstetricians and midwives to vaginal delivery is described. The haptic feedback is provided by means of two hand-based haptic devices able to reproduce force-feedbacks on fingers and arms, thus enabling a much more realistic manipulation respect to stylus-based solutions. Read More

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http://dx.doi.org/10.1109/TITB.2010.2043678DOI Listing
March 2010
11 Reads

Visual-haptic adaptation is determined by relative reliability.

J Neurosci 2010 Jun;30(22):7714-21

Vision Science Program, University of California, Berkeley, California 94720, USA.

Accurate calibration of sensory estimators is critical for maintaining accurate estimates of the environment. Classically, it was assumed that sensory calibration occurs by one sense changing to become consistent with vision; this is visual dominance. Recently, it has been proposed that changes in estimators occur according to their relative reliabilities; this is the reliability-based model. Read More

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http://dx.doi.org/10.1523/JNEUROSCI.6427-09.2010DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3056491PMC
June 2010
19 Reads

Effects of visual-haptic asynchronies and loading-unloading movements on compliance perception.

Brain Res Bull 2011 Jun 1;85(5):245-59. Epub 2010 Mar 1.

Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tübingen, Germany.

Spring compliance is perceived by combining the sensed force exerted by the spring with the displacement caused by the action (sensed through vision and proprioception). We investigated the effect of delay of visual and force information with respect to proprioception to understand how visual-haptic perception of compliance is achieved. First, we confirm an earlier result that force delay increases perceived compliance. Read More

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http://dx.doi.org/10.1016/j.brainresbull.2010.02.009DOI Listing
June 2011
9 Reads

Combination and Integration in the Perception of Visual-Haptic Compliance Information.

IEEE Trans Haptics 2010 Oct-Dec;3(4):234-244. Epub 2010 Mar 25.

The compliance of a material can be conveyed through mechanical interactions in a virtual environment and perceived through both visual and haptic cues. We investigated this basic aspect of perception. In two experiments, subjects performed compliance discriminations, and the mean perceptual estimate (PSE) and the perceptual standard deviation (proportional to JND) were derived from psychophysical functions. Read More

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http://dx.doi.org/10.1109/TOH.2010.9DOI Listing
August 2017
10 Reads

Effects of Packet Loss and Latency on the Temporal Discrimination of Visual-Haptic Events.

IEEE Trans Haptics 2010 Jan-Mar;3(1):28-36. Epub 2009 Oct 30.

Temporal discontinuities and delay caused by packet loss or communication latency often occur in multimodal telepresence systems. It is known that such artifacts can influence the feeling of presence [1]. However, it is largely unknown how the packet loss and communication latency affect the temporal perception of multisensory events. Read More

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http://dx.doi.org/10.1109/TOH.2009.45DOI Listing
August 2017
12 Reads