Effects of stimulus duration on responses of neurons in the Chinchilla inferior colliculus
Effects of stimulus duration on responses of neurons in the Chinchilla inferior colliculus
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DOI：
10.1016/s0378-5955(98)00103-8
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发表时间：
1998-08-01
期刊：
影响因子：
2.8
通讯作者：
Chen, GD
中科院分区：
文献类型：
--
作者：
Chen, GD
在41个单位上研究了纯音刺激持续时间（10 ~ 300 ms）对灰鼠下丘神经元反应的影响。大多数神经元（90%）的反应可分为持续、起始、有起始峰的间歇和无起始峰的间歇反应模式。三个神经元被发现有反应的刺激偏移（偏移响应模式）。一个神经元对声音的反应是自发放电率降低（抑制反应模式）。限制在刺激持续时间内的反应可以简单地从刺激周时间直方图（PSTH）预测到更长的持续时间。长刺激时程下PSTH的先导部分与短刺激时程下PSTH的先导部分相似。峰电位数与持续时间的函数关系与PSTH模式相关。刺激偏移后的反应（包括抑制反应）可以随刺激持续时间非单调变化，并表现出带通或带阻特性。总体而言，四个（约10%）神经元可被视为持续时间调谐单元。持续时间的选择性可以通过神经元的持续过程和偏移过程之间的相互作用来理解。(C)1998 Elsevier Science B. V.保留所有权利。
The effects of the stimulus duration (10 to 300 ms) on the responses of chinchilla inferior colliculus neurons to pure tones were studied in 41 units. The responses of the majority of the neurons (90%) were classified as sustained, onset, pause with onset peak and pause without onset peak response patterns. Three neurons were found to have response to the stimulus offset (offset response pattern). One neuron responded to the sound with the decrease of the spontaneous discharge rate (inhibitory response pattern). The responses restricted within the stimulus duration could be simply predicted from the peristimulus time histogram (PSTH) to the longer duration. The leading part of the PSTH to the longer stimulus duration resembled that to the shorter stimulus duration. The function of the spike number versus duration was correlated with the PSTH patterns. The response following the stimulus offset (including inhibitory response) could vary with the stimulus duration nonmonotonically and show a band-pass or band-reject property. Overall, four (about 10%) of the neurons could be regarded as duration-tuned units. The duration selectivity could be understood by the interaction between the ongoing and the offset process of the neurons. (C) 1998 Elsevier Science B.V. All rights reserved.