REPRESENTATION OF A VOICE ONSET TIME CONTINUUM IN PRIMARY AUDITORY-CORTEX OF THE CAT
REPRESENTATION OF A VOICE ONSET TIME CONTINUUM IN PRIMARY AUDITORY-CORTEX OF THE CAT
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DOI：
10.1121/1.413517
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发表时间：
1995-08-01
影响因子：
2.4
通讯作者：
EGGERMONT, JJ
中科院分区：
文献类型：
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作者：
EGGERMONT, JJ
研究了猫初级听觉皮层中 197 个单个单元的发声时间 (VOT) 的 /ba/-/pa/ 连续体的表示，其中 VOT 以 5 毫秒的步长从 0 到 70 毫秒变化。研究了刺激强度、神经元特征频率和动物年龄的影响。对声音的清音和浊音部分（“双重”响应）的起始反应所代表的最小 VOT 取决于总体刺激水平。研究发现，爆发引起神经活动的功效与对发声开始的后续反应的大小之间存在相互作用。幼年动物（42 毫秒）、幼年动物（36 毫秒）和成年动物（46 毫秒）的最小神经 VOT 平均值仅存在微小差异，但对于个体幼年和幼年动物更频繁地发现接近 10-15 毫秒的值。成人组的累积分布显示，在 30-40 毫秒左右，神经 VOT 相对缺乏。在 VOT 的单个单元和局部神经元组放电率表示中没有发现与分类感知边界相关的其他线索。 (C) 1995 年美国声学学会。
The representation of voice onset time (VOT) for 197 single units in cat primary auditory cortex was studied for a /ba/-/pa/ continuum in which VOT was varied in 5-ms steps from 0 to 70 ms. The effect of stimulus intensity, characteristic frequency of the neurons, and age of the animals was investigated. The minimum VOT represented in onset responses to both the voiceless and voiced parts of the sound (a ''double-on'' response) was dependent on overall stimulus level. An interaction was found between the efficacy of the burst in evoking neural activity and the size of the subsequent response to the onset of voicing. There was only a minor difference in the mean values for the minimal neural VOT for young (42 ms), juvenile (36 ms), and adult animals (46 ms), albeit that for individual young and juvenile animals more frequently values close to 10-15 ms were found. The cumulative distribution for the adult group showed a relative lack of neural VOTs around 30-40 ms. No other cues in the single unit and local neuronal group firing rate representation of VOT were found that were related to the categorical perception boundary. (C) 1995 Acoustical Society of America.