HapticV1, Ncbi, Curation, bibRecord, 002899

Expanding the primate body schema in sensorimotor cortex by virtual touches of an avatar

Identifieur interne : 002899 ( Ncbi/Curation ); précédent : 002898; suivant : 002900

Expanding the primate body schema in sensorimotor cortex by virtual touches of an avatar

Auteurs : Solaiman Shokur [Suisse] ; Joseph E. O Oherty ; Jesse A. Winans ; Hannes Bleuler [Suisse] ; Mikhail A. Lebedev ; Miguel A. L. Nicolelis [Brésil]

Source :

Proceedings of the National Academy of Sciences of the United States of America [ 0027-8424 ] ; 2013.

RBID : PMC:3773736

Abstract

The brain representation of the body, called the body schema, is susceptible to plasticity. For instance, subjects experiencing a rubber hand illusion develop a sense of ownership of a mannequin hand when they view it being touched while tactile stimuli are simultaneously applied to their own hand. Here, the cortical basis of such an embodiment was investigated through concurrent recordings from primary somatosensory (i.e., S1) and motor (i.e., M1) cortical neuronal ensembles while two monkeys observed an avatar arm being touched by a virtual ball. Following a period when virtual touches occurred synchronously with physical brushes of the monkeys' arms, neurons in S1 and M1 started to respond to virtual touches applied alone. Responses to virtual touch occurred 50 to 70 ms later than to physical touch, consistent with the involvement of polysynaptic pathways linking the visual cortex to S1 and M1. We propose that S1 and M1 contribute to the rubber hand illusion and that, by taking advantage of plasticity in these areas, patients may assimilate neuroprosthetic limbs as parts of their body schema.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3773736

DOI: 10.1073/pnas.1308459110
PubMed: 23980141
PubMed Central: 3773736

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PMC:3773736

Le document en format XML

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<front><div type="abstract" xml:lang="en"><p>The brain representation of the body, called the body schema, is susceptible to plasticity. For instance, subjects experiencing a rubber hand illusion develop a sense of ownership of a mannequin hand when they view it being touched while tactile stimuli are simultaneously applied to their own hand. Here, the cortical basis of such an embodiment was investigated through concurrent recordings from primary somatosensory (i.e., S1) and motor (i.e., M1) cortical neuronal ensembles while two monkeys observed an avatar arm being touched by a virtual ball. Following a period when virtual touches occurred synchronously with physical brushes of the monkeys' arms, neurons in S1 and M1 started to respond to virtual touches applied alone. Responses to virtual touch occurred 50 to 70 ms later than to physical touch, consistent with the involvement of polysynaptic pathways linking the visual cortex to S1 and M1. We propose that S1 and M1 contribute to the rubber hand illusion and that, by taking advantage of plasticity in these areas, patients may assimilate neuroprosthetic limbs as parts of their body schema.</p>
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Expanding the primate body schema in sensorimotor cortex by virtual touches of an avatar

Expanding the primate body schema in sensorimotor cortex by virtual touches of an avatar

Source :

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

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Pour générer des pages wiki