| The influence of spatial summation on human tactile directional sensibility. | |
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MedLine Citation:
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PMID: 7778407 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Spatial summation is known to influence the magnitude of sensation for stationary cutaneous stimuli. Yet analysis of moving stimuli may also be pertinent, since most stimuli that attract our attention involve movements over the skin surface. The present investigation dealt with the importance of spatial summation for the appreciation of the direction of motion for moving stimuli. The ability to detect the direction of motion was tested on the radial surface of the forearm with the two-alternative forced-choice method. Stimulation was performed with a rolling wheel, in order to exclude friction-generated activation of stretch receptors. Each subject was tested with two wheels with the same radius but different widths, 1 mm and 15 mm. On average, the subjects performed better with the wide wheel than with the narrow one for stimulation distances > or = 16 mm. This value also probably exceeds the threshold distance for directional discrimination for the narrow wheel, which indicates that spatial summation improves suprathreshold performance. |
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Authors:
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H Olausson |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Somatosensory & motor research Volume: 11 ISSN: 0899-0220 ISO Abbreviation: Somatosens Mot Res Publication Date: 1994 |
Date Detail:
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Created Date: 1995-07-07 Completed Date: 1995-07-07 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8904127 Medline TA: Somatosens Mot Res Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 305-10 Citation Subset: IM; S |
Affiliation:
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Department of Physiology, University of Göteborg, Sweden. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Afferent Pathways / physiology Attention / physiology* Female Forearm / innervation Humans Male Mechanoreceptors / physiology* Membrane Potentials / physiology Orientation / physiology* Peripheral Nerves / physiology Sensory Thresholds / physiology Skin / innervation Synaptic Transmission / physiology* Touch / physiology* |
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