Dynamic cutaneous information is sufficient for precise curvature discrimination
Identifieur interne : 000229 ( Main/Exploration ); précédent : 000228; suivant : 000230Dynamic cutaneous information is sufficient for precise curvature discrimination
Auteurs : Jacob R. Cheeseman [États-Unis] ; J. Farley Norman [États-Unis] ; Astrid M. L. Kappers [Pays-Bas]Source :
- Scientific Reports [ 2045-2322 ] ; 2016.
Abstract
Our tactual perceptual experiences occur when we interact, actively and passively, with environmental objects and surfaces. Previous research has demonstrated that active manual exploration often enhances the tactual perception of object shape. Nevertheless, the factors that contribute to this enhancement are not well understood. The present study evaluated the ability of 28 younger (mean age was 23.1 years) and older adults (mean age was 71.4 years) to discriminate curved surfaces by actively feeling objects with a single index finger and by passively feeling objects that moved relative to a restrained finger. While dynamic cutaneous stimulation was therefore present in both conditions, active exploratory movements only occurred in one. The results indicated that there was a significant and large effect of age, such that the older participants’ thresholds were 43.8 percent higher than those of the younger participants. Despite the overall adverse effect of age, the pattern of results across the active and passive touch conditions was identical. For both age groups, the curvature discrimination thresholds obtained for passive touch were significantly lower than those that occurred during active touch. Curvature discrimination performance was therefore best in the current study when dynamic cutaneous stimulation occurred in the absence of active movement.
Url:
DOI: 10.1038/srep25473
PubMed: 27137417
PubMed Central: 4853778
Affiliations:
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Cheeseman</name><affiliation wicri:level="1"><nlm:aff id="a1"><institution>Department of Psychological Sciences, Ogden College of Science and Engineering, Western Kentucky University</institution>, Bowling Green, Kentucky, 42101-1030,<country>USA</country></nlm:aff><country xml:lang="fr">États-Unis</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Norman, J Farley" sort="Norman, J Farley" uniqKey="Norman J" first="J. Farley" last="Norman">J. Farley Norman</name><affiliation wicri:level="1"><nlm:aff id="a1"><institution>Department of Psychological Sciences, Ogden College of Science and Engineering, Western Kentucky University</institution>, Bowling Green, Kentucky, 42101-1030,<country>USA</country></nlm:aff><country xml:lang="fr">États-Unis</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Kappers, Astrid M L" sort="Kappers, Astrid M L" uniqKey="Kappers A" first="Astrid M. L." last="Kappers">Astrid M. L. Kappers</name><affiliation wicri:level="1"><nlm:aff id="a2"><institution>MOVE Research Institute, Department of Human Movement Sciences, Vrije Universiteit</institution>, Amsterdam,<country>Netherlands</country></nlm:aff><country xml:lang="fr">Pays-Bas</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author></analytic><series><title level="j">Scientific Reports</title><idno type="eISSN">2045-2322</idno><imprint><date when="2016">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Our tactual perceptual experiences occur when we interact, actively and passively, with environmental objects and surfaces. Previous research has demonstrated that active manual exploration often enhances the tactual perception of object shape. Nevertheless, the factors that contribute to this enhancement are not well understood. The present study evaluated the ability of 28 younger (mean age was 23.1 years) and older adults (mean age was 71.4 years) to discriminate curved surfaces by actively feeling objects with a single index finger and by passively feeling objects that moved relative to a restrained finger. While dynamic cutaneous stimulation was therefore present in both conditions, active exploratory movements only occurred in one. The results indicated that there was a significant and large effect of age, such that the older participants’ thresholds were 43.8 percent higher than those of the younger participants. Despite the overall adverse effect of age, the pattern of results across the active and passive touch conditions was identical. For both age groups, the curvature discrimination thresholds obtained for passive touch were significantly lower than those that occurred during active touch. Curvature discrimination performance was therefore best in the current study when dynamic cutaneous stimulation occurred in the absence of active movement.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Gibson, J J" uniqKey="Gibson J">J. J. Gibson</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Heller, M A" uniqKey="Heller M">M. A. Heller</name></author><author><name sortKey="Myers, D S" uniqKey="Myers D">D. S. Myers</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Lederman, S J" uniqKey="Lederman S">S. J. Lederman</name></author><author><name sortKey="Klatzky, R L" uniqKey="Klatzky R">R. L. Klatzky</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Norman, J F" uniqKey="Norman J">J. F. Norman</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Gibson, J J" uniqKey="Gibson J">J. J. 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Farley Norman</name></country><country name="Pays-Bas"><noRegion><name sortKey="Kappers, Astrid M L" sort="Kappers, Astrid M L" uniqKey="Kappers A" first="Astrid M. L." last="Kappers">Astrid M. L. Kappers</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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