Emergence of an Invariant Representation of Texture in Primate Somatosensory Cortex.
invariance
neural coding
neural computation
neural manifolds
touch
Journal
Cerebral cortex (New York, N.Y. : 1991)
ISSN: 1460-2199
Titre abrégé: Cereb Cortex
Pays: United States
ID NLM: 9110718
Informations de publication
Date de publication:
14 05 2020
14 05 2020
Historique:
received:
20
08
2019
revised:
08
11
2019
accepted:
12
11
2019
pubmed:
10
12
2019
medline:
17
11
2021
entrez:
10
12
2019
Statut:
ppublish
Résumé
A major function of sensory processing is to achieve neural representations of objects that are stable across changes in context and perspective. Small changes in exploratory behavior can lead to large changes in signals at the sensory periphery, thus resulting in ambiguous neural representations of objects. Overcoming this ambiguity is a hallmark of human object recognition across sensory modalities. Here, we investigate how the perception of tactile texture remains stable across exploratory movements of the hand, including changes in scanning speed, despite the concomitant changes in afferent responses. To this end, we scanned a wide range of everyday textures across the fingertips of rhesus macaques at multiple speeds and recorded the responses evoked in tactile nerve fibers and somatosensory cortical neurons (from Brodmann areas 3b, 1, and 2). We found that individual cortical neurons exhibit a wider range of speed-sensitivities than do nerve fibers. The resulting representations of speed and texture in cortex are more independent than are their counterparts in the nerve and account for speed-invariant perception of texture. We demonstrate that this separation of speed and texture information is a natural consequence of previously described cortical computations.
Identifiants
pubmed: 31813989
pii: 5669904
doi: 10.1093/cercor/bhz305
pmc: PMC7197205
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Langues
eng
Sous-ensembles de citation
IM
Pagination
3228-3239Subventions
Organisme : NINDS NIH HHS
ID : R01 NS101325
Pays : United States
Organisme : NINDS NIH HHS
ID : R35 NS122333
Pays : United States
Informations de copyright
© The Author(s) 2019. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
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