NEURONAL SUBSTRATES OF HAPTIC SHAPE ENCODING AND MATCHING : A FUNCTIONAL MAGNETIC RESONANCE IMAGING STUDY
Identifieur interne : 005326 ( Main/Merge ); précédent : 005325; suivant : 005327NEURONAL SUBSTRATES OF HAPTIC SHAPE ENCODING AND MATCHING : A FUNCTIONAL MAGNETIC RESONANCE IMAGING STUDY
Auteurs : A. Miquee [France] ; C. Xerri [France] ; C. Rainville [Canada] ; J.-L. Anton [France] ; B. Nazarian [France] ; M. Roth [France] ; Y. Zennou-Azogui [France]Source :
- Neuroscience [ 0306-4522 ] ; 2008.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Homme.
English descriptors
Abstract
-We used functional magnetic resonance imaging to differentiate cerebral areas involved in two different dimensions of haptic shape perception: encoding and matching. For this purpose, healthy right-handed subjects were asked to compare pairs of complex 2D geometrical tactile shapes presented in a sequential two-alternative forced-choice task. Shape encoding involved a large sensorimotor network including the primary (Sl) and secondary (Sll) somatosensory cortex, the anterior part of the intraparietal sulcus (IPA) and of the supramarginal gyrus (SMG), regions previously associated with somatosensory shape perception. Activations were also observed in posterior parietal regions (aSPL), motor and premotor regions (primary motor cortex (Ml), ventral premotor cortex, dorsal premotor cortex, supplementary motor area), as well as prefrontal areas (aPFC, VLPFC), parietal-occipital cortex (POC) and cerebellum. We propose that this distributed network reflects construction and maintenance of sensorimotor traces of exploration hand movements during complex shape encoding, and subsequent transformation of these traces into a more abstract shape representation using kinesthetic imagery. Moreover, haptic shape encoding was found to activate the left lateral occipital complex (LOC), thus corroborating the implication of this extrastriate visual area in multisensory shape representation, besides its contribution to visual imagery. Furthermore, left hemisphere predominance was shown during encoding, whereas right hemisphere predominance was associated with the matching process. Activations of Sl, Ml, PMd and aSPL, which were predominant in the left hemisphere during the encoding, were shifted to the right hemisphere during the matching. In addition, new activations emerged (right dorsolateral prefrontal cortex, bilateral inferior parietal lobe, right Sll) suggesting their specific involvement during 2D geometrical shape matching.
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Rainville</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Département de Psychologie, Université de Montréal, Pavillon Marie-Victorin, 90 Avenue Vincent-d'Indy</s1><s2>Montréal, H2V2S9</s2><s3>CAN</s3><sZ>3 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Montréal, H2V2S9</wicri:noRegion></affiliation></author><author><name sortKey="Anton, J L" sort="Anton, J L" uniqKey="Anton J" first="J.-L." last="Anton">J.-L. Anton</name><affiliation wicri:level="3"><inist:fA14 i1="03"><s1>Centre d'Imagerie par Résonnance Magnétique, Fonctionnelle de Marseille, CHU La Timone, 264 Rue St Pierre</s1><s2>13385 Marseille</s2><s3>FRA</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Provence-Alpes-Côte d'Azur</region><settlement type="city">Marseille</settlement></placeName></affiliation></author><author><name sortKey="Nazarian, B" sort="Nazarian, B" uniqKey="Nazarian B" first="B." last="Nazarian">B. 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Roth</name><affiliation wicri:level="3"><inist:fA14 i1="03"><s1>Centre d'Imagerie par Résonnance Magnétique, Fonctionnelle de Marseille, CHU La Timone, 264 Rue St Pierre</s1><s2>13385 Marseille</s2><s3>FRA</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Provence-Alpes-Côte d'Azur</region><settlement type="city">Marseille</settlement></placeName></affiliation></author><author><name sortKey="Zennou Azogui, Y" sort="Zennou Azogui, Y" uniqKey="Zennou Azogui Y" first="Y." last="Zennou-Azogui">Y. Zennou-Azogui</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Laboratoire de Neurobiologie Intégrative et Adaptative (UMR 6149), Aix-Marseille Université/Université de Provence/CNRS, Centre St-Charles, Pôle 3C, case B, 3, Place Victor Hugo</s1><s2>13331 Marseille</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Provence-Alpes-Côte d'Azur</region><settlement type="city">Marseille</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Neuroscience</title><title level="j" type="abbreviated">Neuroscience</title><idno type="ISSN">0306-4522</idno><imprint><date when="2008">2008</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Neuroscience</title><title level="j" type="abbreviated">Neuroscience</title><idno type="ISSN">0306-4522</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Encephalon</term><term>Functional imaging</term><term>Human</term><term>Nuclear magnetic resonance imaging</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Imagerie fonctionnelle</term><term>Imagerie RMN</term><term>Encéphale</term><term>Homme</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Homme</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">-We used functional magnetic resonance imaging to differentiate cerebral areas involved in two different dimensions of haptic shape perception: encoding and matching. For this purpose, healthy right-handed subjects were asked to compare pairs of complex 2D geometrical tactile shapes presented in a sequential two-alternative forced-choice task. Shape encoding involved a large sensorimotor network including the primary (Sl) and secondary (Sll) somatosensory cortex, the anterior part of the intraparietal sulcus (IPA) and of the supramarginal gyrus (SMG), regions previously associated with somatosensory shape perception. Activations were also observed in posterior parietal regions (aSPL), motor and premotor regions (primary motor cortex (Ml), ventral premotor cortex, dorsal premotor cortex, supplementary motor area), as well as prefrontal areas (aPFC, VLPFC), parietal-occipital cortex (POC) and cerebellum. We propose that this distributed network reflects construction and maintenance of sensorimotor traces of exploration hand movements during complex shape encoding, and subsequent transformation of these traces into a more abstract shape representation using kinesthetic imagery. Moreover, haptic shape encoding was found to activate the left lateral occipital complex (LOC), thus corroborating the implication of this extrastriate visual area in multisensory shape representation, besides its contribution to visual imagery. Furthermore, left hemisphere predominance was shown during encoding, whereas right hemisphere predominance was associated with the matching process. Activations of Sl, Ml, PMd and aSPL, which were predominant in the left hemisphere during the encoding, were shifted to the right hemisphere during the matching. In addition, new activations emerged (right dorsolateral prefrontal cortex, bilateral inferior parietal lobe, right Sll) suggesting their specific involvement during 2D geometrical shape matching.</div></front></TEI><affiliations><list><country><li>Canada</li><li>France</li></country><region><li>Provence-Alpes-Côte d'Azur</li></region><settlement><li>Marseille</li></settlement></list><tree><country name="France"><region name="Provence-Alpes-Côte d'Azur"><name sortKey="Miquee, A" sort="Miquee, A" uniqKey="Miquee A" first="A." last="Miquee">A. Miquee</name></region><name sortKey="Anton, J L" sort="Anton, J L" uniqKey="Anton J" first="J.-L." last="Anton">J.-L. Anton</name><name sortKey="Nazarian, B" sort="Nazarian, B" uniqKey="Nazarian B" first="B." last="Nazarian">B. Nazarian</name><name sortKey="Roth, M" sort="Roth, M" uniqKey="Roth M" first="M." last="Roth">M. Roth</name><name sortKey="Xerri, C" sort="Xerri, C" uniqKey="Xerri C" first="C." last="Xerri">C. Xerri</name><name sortKey="Zennou Azogui, Y" sort="Zennou Azogui, Y" uniqKey="Zennou Azogui Y" first="Y." last="Zennou-Azogui">Y. Zennou-Azogui</name></country><country name="Canada"><noRegion><name sortKey="Rainville, C" sort="Rainville, C" uniqKey="Rainville C" first="C." last="Rainville">C. Rainville</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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