Influence of object shape on responses of human tactile afferents under conditions characteristic of manipulation
Identifieur interne : 007338 ( Main/Merge ); précédent : 007337; suivant : 007339Influence of object shape on responses of human tactile afferents under conditions characteristic of manipulation
Auteurs : Per Jenmalm [Suède] ; Ingvars Birznieks [Suède] ; Antony W. Goodwin ; Roland S. Johansson [Suède]Source :
- European Journal of Neuroscience [ 0953-816X ] ; 2003-07.
English descriptors
- KwdEn :
Abstract
Most objects that we grasp, lift and further manipulate are curved, with curvatures of the same order of magnitude as those of the fingertips. Tactile information pertaining to such ‘gross’ geometrical features of objects are used in the automatic control of fingertip actions. We analyzed responses from 172 human tactile afferents distributed over the entire terminal phalanx when spherically shaped surfaces were applied to a standard site on the fingertip; the curvatures and force magnitudes and directions used were representative of everyday manipulations. Nearly all SA‐I, SA‐II and FA‐I afferents responded, and for more than 80% of these afferents the response intensity was correlated with curvature. The correlation was positive for approximately half the afferents and negative for the other half, resulting in a curvature contrast signal within the populations of tactile afferents; afferents terminating at the sides and end of the fingertip tended to show negative correlations. For nearly all afferents, curvature and force direction had interactive effects. Changing the direction of force affected an afferent's sensitivity to curvature and vice versa. We conclude that recognition of such shapes takes advantage of signals originating from tactile afferents distributed over the entire terminal phalanx, and that both the direction of fingertip forces and the curvatures of objects contacted during natural manipulations influence the afferents' responses. Consequently, if humans are able to perceive independently curvature and force direction from signals in tactile afferents, then the CNS must possess mechanisms that disentangle interactions between these and other parameters of stimuli on the fingertips.
Url:
DOI: 10.1046/j.1460-9568.2003.02721.x
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 003D84
- to stream Istex, to step Curation: 003D84
- to stream Istex, to step Checkpoint: 002648
Links to Exploration step
ISTEX:FC06822DA6AF50344EE69FEE6F9977D4CDEB141CLe document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Influence of object shape on responses of human tactile afferents under conditions characteristic of manipulation</title><author><name sortKey="Jenmalm, Per" sort="Jenmalm, Per" uniqKey="Jenmalm P" first="Per" last="Jenmalm">Per Jenmalm</name></author><author><name sortKey="Birznieks, Ingvars" sort="Birznieks, Ingvars" uniqKey="Birznieks I" first="Ingvars" last="Birznieks">Ingvars Birznieks</name></author><author><name sortKey="Goodwin, Antony W" sort="Goodwin, Antony W" uniqKey="Goodwin A" first="Antony W." last="Goodwin">Antony W. Goodwin</name></author><author><name sortKey="Johansson, Roland S" sort="Johansson, Roland S" uniqKey="Johansson R" first="Roland S." last="Johansson">Roland S. Johansson</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:FC06822DA6AF50344EE69FEE6F9977D4CDEB141C</idno><date when="2003" year="2003">2003</date><idno type="doi">10.1046/j.1460-9568.2003.02721.x</idno><idno type="url">https://api.istex.fr/document/FC06822DA6AF50344EE69FEE6F9977D4CDEB141C/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">003D84</idno><idno type="wicri:Area/Istex/Curation">003D84</idno><idno type="wicri:Area/Istex/Checkpoint">002648</idno><idno type="wicri:doubleKey">0953-816X:2003:Jenmalm P:influence:of:object</idno><idno type="wicri:Area/Main/Merge">007338</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Influence of object shape on responses of human tactile afferents under conditions characteristic of manipulation</title><author><name sortKey="Jenmalm, Per" sort="Jenmalm, Per" uniqKey="Jenmalm P" first="Per" last="Jenmalm">Per Jenmalm</name><affiliation wicri:level="1"><country xml:lang="fr">Suède</country><wicri:regionArea>Department of Integrative Medical Biology, Physiology Section, Umeå University, SE‐901 87 Umeå</wicri:regionArea><wicri:noRegion>SE‐901 87 Umeå</wicri:noRegion></affiliation></author><author><name sortKey="Birznieks, Ingvars" sort="Birznieks, Ingvars" uniqKey="Birznieks I" first="Ingvars" last="Birznieks">Ingvars Birznieks</name><affiliation wicri:level="1"><country xml:lang="fr">Suède</country><wicri:regionArea>Department of Integrative Medical Biology, Physiology Section, Umeå University, SE‐901 87 Umeå</wicri:regionArea><wicri:noRegion>SE‐901 87 Umeå</wicri:noRegion></affiliation></author><author><name sortKey="Goodwin, Antony W" sort="Goodwin, Antony W" uniqKey="Goodwin A" first="Antony W." last="Goodwin">Antony W. Goodwin</name><affiliation><wicri:noCountry code="subField">Victoria Australia 3010</wicri:noCountry></affiliation></author><author><name sortKey="Johansson, Roland S" sort="Johansson, Roland S" uniqKey="Johansson R" first="Roland S." last="Johansson">Roland S. Johansson</name><affiliation wicri:level="1"><country xml:lang="fr">Suède</country><wicri:regionArea>Department of Integrative Medical Biology, Physiology Section, Umeå University, SE‐901 87 Umeå</wicri:regionArea><wicri:noRegion>SE‐901 87 Umeå</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">European Journal of Neuroscience</title><idno type="ISSN">0953-816X</idno><idno type="eISSN">1460-9568</idno><imprint><publisher>Blackwell Science, Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2003-07">2003-07</date><biblScope unit="volume">18</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="164">164</biblScope><biblScope unit="page" to="176">176</biblScope></imprint><idno type="ISSN">0953-816X</idno></series><idno type="istex">FC06822DA6AF50344EE69FEE6F9977D4CDEB141C</idno><idno type="DOI">10.1046/j.1460-9568.2003.02721.x</idno><idno type="ArticleID">EJN2721</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0953-816X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>cutaneous mechanoreceptors</term><term>fingertip force</term><term>human fingertip</term><term>microneurography</term><term>object curvature</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Most objects that we grasp, lift and further manipulate are curved, with curvatures of the same order of magnitude as those of the fingertips. Tactile information pertaining to such ‘gross’ geometrical features of objects are used in the automatic control of fingertip actions. We analyzed responses from 172 human tactile afferents distributed over the entire terminal phalanx when spherically shaped surfaces were applied to a standard site on the fingertip; the curvatures and force magnitudes and directions used were representative of everyday manipulations. Nearly all SA‐I, SA‐II and FA‐I afferents responded, and for more than 80% of these afferents the response intensity was correlated with curvature. The correlation was positive for approximately half the afferents and negative for the other half, resulting in a curvature contrast signal within the populations of tactile afferents; afferents terminating at the sides and end of the fingertip tended to show negative correlations. For nearly all afferents, curvature and force direction had interactive effects. Changing the direction of force affected an afferent's sensitivity to curvature and vice versa. We conclude that recognition of such shapes takes advantage of signals originating from tactile afferents distributed over the entire terminal phalanx, and that both the direction of fingertip forces and the curvatures of objects contacted during natural manipulations influence the afferents' responses. Consequently, if humans are able to perceive independently curvature and force direction from signals in tactile afferents, then the CNS must possess mechanisms that disentangle interactions between these and other parameters of stimuli on the fingertips.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Ticri/CIDE/explor/HapticV1/Data/Main/Merge
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 007338 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Merge/biblio.hfd -nk 007338 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Ticri/CIDE
|area= HapticV1
|flux= Main
|étape= Merge
|type= RBID
|clé= ISTEX:FC06822DA6AF50344EE69FEE6F9977D4CDEB141C
|texte= Influence of object shape on responses of human tactile afferents under conditions characteristic of manipulation
}}
| This area was generated with Dilib version V0.6.23. |  |