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

SPinPong - Virtual Reality Table Tennis Skill Acquisition using Visual, Haptic and Temporal Cues.

IEEE Trans Vis Comput Graph 2021 May 15;27(5):2566-2576. Epub 2021 Apr 15.

Learning an advanced skill in sports requires a huge amount of practice and players also have to overcome both physical difficulties and the dullness of repetitive training. Returning a fast spin shot in table tennis could be taken as an example, as athletes need to judge the spin type and decide the racket pose within a second, which is difficult for beginners. Therefore, in this paper, we show how to design an intuitive training system to acquire this specific skill using different cues in Virtual Reality (VR). Read More

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Proposal and Evaluation of Visual Haptics for Manipulation of Remote Machine System.

Front Robot AI 2020 7;7:529040. Epub 2020 Oct 7.

Mitsubishi Electric Research Laboratories (MERL), Cambridge, MA, United States.

Remote machine systems have drawn a lot of attention owing to accelerations of virtual reality (VR), augmented reality (AR), and the fifth generation (5G) networks. Despite recent trends of developing autonomous systems, the realization of sophisticated dexterous hand that can fully replace human hands is considered to be decades away. It is also extremely difficult to reproduce the sensilla of complex human hands. Read More

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October 2020

[Medical device training in arthroplasty : National practice and quality standards].

Orthopade 2020 Dec;49(12):1072-1076

Orthopädische Klinik und Poliklinik, Universitätsmedizin Rostock, Doberaner Straße 142, 18057, Rostock, Deutschland.

The qualified training of users of medicinal products is enshrined in law by the Medical Devices Act. In this article, a survey and analysis of the training measures for arthroplasty of the large joints offered by distributors of medical devices is carried out. To that end, the internet presence of suppliers of medical devices was evaluated with regard to the training measures on offer, and selected suppliers were sent questionnaires. Read More

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December 2020

Influence of action video gaming on spatial representation in the haptic modality.

Exp Brain Res 2020 Dec 29;238(12):2769-2781. Epub 2020 Sep 29.

Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands.

Spatial representation in the haptic domain has been shown to be prone to systematic errors. When participants are asked to make two bars haptically parallel, their performance deviates from what would be veridically parallel. This is hypothesized to be caused by the bias of the egocentric reference frame. Read More

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December 2020

An artificial sensory neuron with visual-haptic fusion.

Nat Commun 2020 09 14;11(1):4602. Epub 2020 Sep 14.

Innovative Center for Flexible Devices (iFLEX), Max Planck - NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore, Singapore.

Human behaviors are extremely sophisticated, relying on the adaptive, plastic and event-driven network of sensory neurons. Such neuronal system analyzes multiple sensory cues efficiently to establish accurate depiction of the environment. Here, we develop a bimodal artificial sensory neuron to implement the sensory fusion processes. Read More

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September 2020

Anorexia nervosa and the size-weight illusion: No evidence of impaired visual-haptic object integration.

PLoS One 2020 27;15(8):e0237421. Epub 2020 Aug 27.

Utrecht University, Faculty of Social and Behavioural Sciences, Experimental Psychology/Helmholtz Institute, Utrecht, The Netherlands.

Body image disorders in anorexia nervosa (AN) patients and recovered AN (RAN) patients have been suggested to stem from aberrant integration of sensory information. Previous research by Case et al. (2012) used the size-weight illusion (SWI) to study multisensory integration in AN. Read More

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October 2020

Haptic Intracorporeal Palpation Using a Cable-Driven Parallel Robot: A User Study.

IEEE Trans Biomed Eng 2020 12 19;67(12):3452-3463. Epub 2020 Nov 19.

Objective: Intraoperative palpation is a surgical gesture jeopardized by the lack of haptic feedback which affects robotic minimally invasive surgery. Restoring the force reflection in teleoperated systems may improve both surgeons' performance and procedures' outcome.

Methods: A force-based sensing approach was developed, based on a cable-driven parallel manipulator with anticipated seamless and low-cost integration capabilities in teleoperated robotic surgery. Read More

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December 2020

Even distorted felt size engenders visual-haptic integration.

Atten Percept Psychophys 2020 Oct;82(7):3686-3695

Department of Psychological Sciences, Benedictine College, Atchison, KS, USA.

Intersensory interactions predicted by the sensory precision hypothesis have been infrequently examined by distorting the reliability of size perception by touch. Consequently, participants were asked to see one size and manually feel another unseen size either with bare fingers or with fingers sleeved in rigid tubes to decrease the precision of touch. Their subsequent visual estimates of the perceived size favored the more precise modality. Read More

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October 2020

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

Multisens Res 2020 03 17;33(4-5):521-548. Epub 2020 Mar 17.

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

Annu Int Conf 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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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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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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September 2019

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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October 2019

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

Multisens Res 2019 12 11;32(8):771-796. Epub 2019 Dec 11.

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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December 2019

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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February 2019

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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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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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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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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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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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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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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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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January 2017

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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September 2019

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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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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October 2015

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

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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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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