Sound identity is represented robustly in auditory cortex during perceptual constancy.
Sound identity is represented robustly in auditory cortex during perceptual constancy.
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DOI：
10.1038/s41467-018-07237-3
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发表时间：
2018-11-14
影响因子：
16.6
通讯作者：
Bizley JK
中科院分区：
文献类型：
--
作者：
Town SM;Wood KC;Bizley JK
感知恒定性需要神经表征对对象身份有选择性，但也能容忍身份保留的转换。这些表征如何在大脑中产生并支持感知仍不清楚。在这里，我们通过记录雪貂听觉皮层在知觉恒定期间的神经活动来研究听觉系统中声音身份的容忍表示。雪貂概括了基频、声级和位置变化中的元音同一性，而神经元则在声学变化中稳健地表示声音同一性。在所有条件下，刺激特征都以不同的时间过程进行编码，但是当动物无法概括和被动聆听时，声音识别的编码会被延迟。神经元还对与任务无关的声音特征以及动物的选择和准确性的信息进行编码，而群体解码的表现优于动物的行为。我们的结果表明，在知觉恒常性期间，声音身份在广泛变化的条件下在听觉皮层中得到强有力的体现，并且行为泛化需要身份信息的保守时间安排。感知恒定性要求神经表征对对象身份有选择性，但又能容忍身份保留的转换。在这里，作者表明，声音身份在听觉皮层中得到了强有力的体现，并且行为概括需要身份信息的精确计时。
Perceptual constancy requires neural representations that are selective for object identity, but also tolerant across identity-preserving transformations. How such representations arise in the brain and support perception remains unclear. Here, we study tolerant representation of sound identity in the auditory system by recording neural activity in auditory cortex of ferrets during perceptual constancy. Ferrets generalize vowel identity across variations in fundamental frequency, sound level and location, while neurons represent sound identity robustly across acoustic variations. Stimulus features are encoded with distinct time-courses in all conditions, however encoding of sound identity is delayed when animals fail to generalize and during passive listening. Neurons also encode information about task-irrelevant sound features, as well as animals’ choices and accuracy, while population decoding out-performs animals’ behavior. Our results show that during perceptual constancy, sound identity is represented robustly in auditory cortex across widely varying conditions, and behavioral generalization requires conserved timing of identity information. Perceptual constancy requires neural representations selective for object identity, yet tolerant of identity-preserving transformations. Here, the authors show that sound identity is represented robustly in auditory cortex and that behavioral generalization requires precise timing of identity information.
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DOI：
10.1121/1.4768798
发表时间：
2013-01
期刊：
The Journal of the Acoustical Society of America
影响因子：
--
作者：
Bizley JK;Walker KM;King AJ;Schnupp JW
通讯作者：
Schnupp JW
影响因子：
34.7
作者：
Bizley, Jennifer K.;Cohen, Yale E.
通讯作者：
Cohen, Yale E.
影响因子：
25
作者：
Jaramillo, Santiago;Zador, Anthony M.
通讯作者：
Zador, Anthony M.
影响因子：
2.5
作者：
KOJIMA, S;KIRITANI, S
通讯作者：
KIRITANI, S
影响因子：
25
作者：
通讯作者：
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