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Functional subdivisions in low-frequency primary auditory cortex (AI).

Functional subdivisions in low-frequency primary auditory cortex (AI).

Authors :
Wallace MN
Palmer AR
Source :
Experimental brain research [Exp Brain Res] 2009 Apr; Vol. 194 (3), pp. 395-408. Date of Electronic Publication: 2009 Feb 10.
Publication Year :
2009

Abstract

We wished to test the hypothesis that there are modules in low-frequency AI that can be identified by their responsiveness to communication calls or particular regions of space. Units were recorded in anaesthetised guinea pig AI and stimulated with conspecific vocalizations and a virtual motion stimulus (binaural beats) presented via a closed sound system. Recording tracks were mainly oriented orthogonally to the cortical surface. Some of these contained units that were all time-locked to the structure of the chutter call (14/22 tracks) and/or the purr call (12/22 tracks) and/or that had a preference for stimuli from a particular region of space (8/20 tracks with four contralateral, two ipsilateral and two midline), or where there was a strong asymmetry in the response to beats of different direction (two tracks). We conclude that about half of low-frequency AI is organized into modules that are consistent with separate "what" and "where" pathways.

Details

Language :
English
ISSN :
1432-1106
Volume :
194
Issue :
3
Database :
MEDLINE
Journal :
Experimental brain research
Publication Type :
Academic Journal
Accession number :
19205681
Full Text :
https://doi.org/10.1007/s00221-009-1714-8