Neurophysiological mechanisms involved in auditory perceptual organization.

Neurophysiological mechanisms involved in auditory perceptual organization.
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DOI:
10.3389/neuro.01.025.2009
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发表时间:
2009-09
影响因子:
4.3
通讯作者:
Bertrand O
Bertrand O
中科院分区:
医学2区
文献类型:
--
作者:
Bidet-Caulet A;Bertrand O

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在我们复杂的声学环境中,我们面临着几个同时产生的声音的混合。然而,我们很少将这些声音视为难以理解的噪音。我们的大脑使用知觉组织过程来独立跟踪每个声源随着时间的推移而发出的声音。如果在这些过程中利用的声学特性得到了很好的证实,那么听觉场景分析所涉及的神经生理机制仍然不清楚,最近引起了更多的兴趣。在这里,我们回顾了在动物和人类中使用从耳蜗核到听觉皮质的电生理记录来研究这些机制的研究。他们的发现表明,频率选择性、前向抑制和多秒习惯化等基本机制塑造了大脑对声音的自动反应,这种方式可以解释同时和连续声音感知组织的几个重要特征。一个具有挑战性的问题仍然没有解决:如何整合由此产生的活动模式,以产生相应的有意识的感知?
In our complex acoustic environment, we are confronted with a mixture of sounds produced by several simultaneous sources. However, we rarely perceive these sounds as incomprehensible noise. Our brain uses perceptual organization processes to independently follow the emission of each sound source over time. If the acoustic properties exploited in these processes are well-established, the neurophysiological mechanisms involved in auditory scene analysis remain unclear and have recently raised more interest. Here, we review the studies investigating these mechanisms using electrophysiological recordings from the cochlear nucleus to the auditory cortex, in animals and humans. Their findings reveal that basic mechanisms such as frequency selectivity, forward suppression and multi-second habituation shape the automatic brain responses to sounds in a way that can account for several important characteristics of perceptual organization of both simultaneous and successive sounds. One challenging question remains unresolved: how are the resulting activity patterns integrated to yield the corresponding conscious percepts?
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发表时间: 2007-08-29
影响因子: 5.3
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