Neuronal oscillations and visual amplification of speech

被引:364
作者
Schroeder, Charles E. [1 ]
Lakatos, Peter [1 ]
Kajikawa, Yoshinao [1 ]
Partan, Sarah [2 ]
Puce, Aina [3 ,4 ]
机构
[1] Nathan S Kline Inst Psychiat Res, Cognit Neurosci & Schizophrenia Program, Orangeburg, NY 10962 USA
[2] Hampshire Coll, Sch Cognit Sci, Amherst, MA 01002 USA
[3] W Virginia Sch Med, Dept Radiol, Morgantown, WV 26506 USA
[4] W Virginia Sch Med, Ctr Adv Imaging, Morgantown, WV 26506 USA
关键词
D O I
10.1016/j.tics.2008.01.002
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
It is widely recognized that viewing a speaker's face enhances vocal communication, although the neural substrates of this phenomenon remain unknown. We propose that the enhancement effect uses the ongoing oscillatory activity of local neuronal ensembles in the primary auditory cortex. Neuronal oscillations reflect rhythmic shifting of neuronal ensembles between high and low excitability states. Our hypothesis holds that oscillations are 'predictively' modulated by visual input, so that related auditory input arrives during a high excitability phase and is thus amplified. We discuss the anatomical substrates and key timing parameters that enable and constrain this effect. Our hypothesis makes testable predictions for future studies and emphasizes the idea that 'background' oscillatory activity is instrumental to cortical sensory processing.
引用
收藏
页码:106 / 113
页数:8
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