Auditory cortical contrast enhancing by global winner-take-all inhibitory interactions.
Auditory cortical contrast enhancing by global winner-take-all inhibitory interactions.
复制标题
DOI:
10.1371/journal.pone.0001735
复制
发表时间:
2008-03-05
期刊:
影响因子:
3.7
通讯作者:
Schulze H
中科院分区:
文献类型:
--
作者:
Kurt S;Deutscher A;Crook JM;Ohl FW;Budinger E;Moeller CK;Scheich H;Schulze H
Brains decompose the world into discrete objects of perception, thereby facing the problem of how to segregate and selectively address similar objects that are concurrently present in a scene. Theoretical models propose that this could be achieved by neuronal implementations of so-called winner-take-all algorithms where neuronal representations of objects or object features interact in a competitive manner. Here we present evidence for the existence of such a mechanism in an animal species. We present electrophysiological, neuropharmacological and neuroanatomical data which suggest a novel view of the role of GABAA-mediated inhibition in primary auditory cortex (AI), where intracortical GABAA-mediated inhibition operates on a global scale within a circular map of sound periodicity representation in AI, with functionally inhibitory projections of similar effect from any location throughout the whole map. These interactions could underlie the proposed competitive “winner-take-all” algorithm to support object segregation, e.g., segregation of different speakers in cocktail-party situations.
登录
查看更多内容
影响因子:
2.8
作者:
Chen, QC;Jen, PHS
通讯作者:
Jen, PHS
影响因子:
2.4
作者:
CHERRY, EC
通讯作者:
CHERRY, EC
影响因子:
64.8
作者:
Porrill, J;Frisby, JP;Buckley, D
通讯作者:
Buckley, D
影响因子:
2.5
作者:
Sutter, ML;Schreiner, CE;Loftus, WC
通讯作者:
Loftus, WC
影响因子:
1.9
作者:
VONDERMALSBURG, C;SCHNEIDER, W
通讯作者:
SCHNEIDER, W