Abstract In the general population, suppression of vision modulates body sway by increasing the center of pressure (CoP) velocity, while a light fingertip touch reduces the area of the CoP displacement in blindfolded subjects. This study assessed whether imagined fixation and fingertip touch differentially stabilize posture in subjects with high (highs) and low (lows) hypnotizability. Visual and tactile imageries were ineffective in lows. In highs, the effects of visual imagery could not be evaluated because the real information was ineffective; real tactile stimulation was effective only on velocity, but the imagery effects could not be definitely assessed owing to low effect size. The highs' larger variability could account for this and represents the most important finding.
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http://dx.doi.org/10.1080/00207144.2014.901080 | DOI Listing |
medRxiv
December 2024
Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States.
Introduction: Dynamic modulation of grip occurs mainly within the major structures of the brain stem, in parallel with cortical control. This basic, but fundamental level of the brain, is robust to ill-formed feedback and to be useful, it may not require all the perceptual information of feedback we are consciously aware. This makes it viable candidate for using peripheral nerve stimulation (PNS), a form of tactile feedback that conveys intensity and location information of touch well but does not currently reproduce other qualities of natural touch.
View Article and Find Full Text PDFJ Physiol
December 2024
Delft University of Technology, Delft, The Netherlands.
A task as simple as holding a cup between your fingers generates complex motor commands to finely regulate the forces applied by muscles. These fine force adjustments ensure the stability and integrity of the object by preventing it from slipping out of grip during manipulation and by reacting to perturbations. To do so, our sensorimotor system constantly monitors tactile and proprioceptive information about the force object exerts on fingertips and the friction of the surfaces to determine the optimal grip force.
View Article and Find Full Text PDFJ Neurophysiol
December 2024
Department of Kinesiology and Health Sciences, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada, N2L 3G1.
Integrated multisensory feedback plays a crucial role in balance control. Minimal fingertip contact with a surface (light-touch), reduces center of pressure (CoP) by adding sensory information about postural orientation and balance state. Electrical vestibular stimulation (EVS) can increase sway by adding erroneous vestibular cues.
View Article and Find Full Text PDFMed Humanit
January 2025
Mechanical Engineering, Faculty of Engineering and Physical Sciences, University of Leeds, Leeds, UK
In this paper, we imagine how future technologies could support people who have severe hearing and visual impairment or a deafblind condition. Much effort has gone into assistive technologies to improve access for people with visual or hearing impairments, and while some of these systems will work for people with dual sensory loss, this is not always the case. Fewer systems have been developed specifically for this group.
View Article and Find Full Text PDFAppetite
January 2025
Department of Clinical Psychological Science, Faculty of Psychology & Neuroscience, Maastricht University, the Netherlands.
The texture of foods plays an important role in the liking of foods. Especially for picky eaters, texture can be a reason to reject foods. Previous studies showed that picky eaters in general dislike tactile stimulation more, which can include the feel of sand in their hands and specific food textures in their mouth.
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