Journal
CEREBRAL CORTEX
Volume 15, Issue 11, Pages 1690-1696Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/cercor/bhi045
Keywords
AII; auditory; barrel; polysensory; SII
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Funding
- NINDS NIH HHS [1 R01 NS36981] Funding Source: Medline
- ODCDC CDC HHS [UR3/CCU824219] Funding Source: Medline
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The function of secondary somatosensory (SII) cortex is poorly understood, but there is evidence to suggest that one of its roles may be in multisensory integration. This study used high-resolution field potential mapping coupled with laminar field potential and multiunit recording to examine the association between SII and multisensory (auditory-somatosensory) cortex in the rat. We demonstrate that while there is spatial overlap between unisensory areas of SII and multisensory regions, particularly for representations of the trunk and hind limbs, they form distinct somatotopic maps. We propose that multisensory cortex be considered functionally distinct from SII, and that SII may be more concerned with unisensory processing tasks.
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