High-dimensional representation of texture in somatosensory cortex of primates.
neurophysiology
perception
roughness
tactile fibers
touch
Journal
Proceedings of the National Academy of Sciences of the United States of America
ISSN: 1091-6490
Titre abrégé: Proc Natl Acad Sci U S A
Pays: United States
ID NLM: 7505876
Informations de publication
Date de publication:
19 02 2019
19 02 2019
Historique:
pubmed:
6
2
2019
medline:
2
5
2019
entrez:
6
2
2019
Statut:
ppublish
Résumé
In the somatosensory nerves, the tactile perception of texture is driven by spatial and temporal patterns of activation distributed across three populations of afferents. These disparate streams of information must then be integrated centrally to achieve a unified percept of texture. To investigate the representation of texture in somatosensory cortex, we scanned a wide range of natural textures across the fingertips of rhesus macaques and recorded the responses evoked in Brodmann's areas 3b, 1, and 2. We found that texture identity is reliably encoded in the idiosyncratic responses of populations of cortical neurons, giving rise to a high-dimensional representation of texture. Cortical neurons fall along a continuum in their sensitivity to fine vs. coarse texture, and neurons at the extrema of this continuum seem to receive their major input from different afferent populations. Finally, we show that cortical responses can account for several aspects of texture perception in humans.
Identifiants
pubmed: 30718436
pii: 1818501116
doi: 10.1073/pnas.1818501116
pmc: PMC6386651
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Langues
eng
Sous-ensembles de citation
IM
Pagination
3268-3277Subventions
Organisme : NINDS NIH HHS
ID : R01 NS101325
Pays : United States
Organisme : NINDS NIH HHS
ID : R35 NS122333
Pays : United States
Informations de copyright
Copyright © 2019 the Author(s). Published by PNAS.
Déclaration de conflit d'intérêts
The authors declare no conflict of interest.
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