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恒河猴听觉背侧流早期区域在空间和时间上的选择性。

Selectivity for space and time in early areas of the auditory dorsal stream in the rhesus monkey.

机构信息

Department of Neuroscience, Georgetown University Medical Center, Washington, District of Columbia.

出版信息

J Neurophysiol. 2014 Apr;111(8):1671-85. doi: 10.1152/jn.00436.2013. Epub 2014 Feb 5.


DOI:10.1152/jn.00436.2013
PMID:24501260
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4035775/
Abstract

The respective roles of ventral and dorsal cortical processing streams are still under discussion in both vision and audition. We characterized neural responses in the caudal auditory belt cortex, an early dorsal stream region of the macaque. We found fast neural responses with elevated temporal precision as well as neurons selective to sound location. These populations were partly segregated: Neurons in a caudomedial area more precisely followed temporal stimulus structure but were less selective to spatial location. Response latencies in this area were even shorter than in primary auditory cortex. Neurons in a caudolateral area showed higher selectivity for sound source azimuth and elevation, but responses were slower and matching to temporal sound structure was poorer. In contrast to the primary area and other regions studied previously, latencies in the caudal belt neurons were not negatively correlated with best frequency. Our results suggest that two functional substreams may exist within the auditory dorsal stream.

摘要

腹侧和背侧皮质处理流各自的作用在视觉和听觉领域仍在讨论中。我们描述了猕猴的听觉后带皮层(初级背侧流区域的一个后部区域)中的神经反应。我们发现了具有更高时间精度的快速神经反应以及对声音位置有选择性的神经元。这些群体部分分离:在一个尾内侧区域的神经元更精确地跟随时间刺激结构,但对空间位置的选择性较小。该区域的反应潜伏期甚至比初级听觉皮层更短。在一个尾外侧区域的神经元对声源方位和仰角具有更高的选择性,但反应较慢,与时间声音结构的匹配较差。与初级区域和之前研究的其他区域相比,后带神经元的潜伏期与最佳频率没有负相关。我们的结果表明,听觉背侧流中可能存在两个功能子流。

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本文引用的文献

[1]
Neural latencies across auditory cortex of macaque support a dorsal stream supramodal timing advantage in primates.

Proc Natl Acad Sci U S A. 2012-10-16

[2]
Ventral and dorsal streams in the evolution of speech and language.

Front Evol Neurosci. 2012-5-15

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J Neurophysiol. 2012-5-16

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Phoneme and word recognition in the auditory ventral stream.

Proc Natl Acad Sci U S A. 2012-2-1

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Cytoarchitecture and cortical connections of the anterior cingulate and adjacent somatomotor fields in the rhesus monkey.

Brain Res Bull. 2012-1-2

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Sound-identity processing in early areas of the auditory ventral stream in the macaque.

J Neurophysiol. 2011-11-30

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J Neurosci. 2011-6-22

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A new neural framework for visuospatial processing.

Nat Rev Neurosci. 2011-4

[10]
Correlation of neural response properties with auditory thalamus subdivisions in the awake marmoset.

J Neurophysiol. 2011-3-16

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