Schwarz D W, Dezsö A, Neufeld P R
Rotary Hearing Centre, University of British Columbia, Vancouver, Canada.
Acta Otolaryngol. 1993 May;113(3):266-70. doi: 10.3109/00016489309135807.
A group of neurons in the inferior colliculus (IC) of the chicken displayed frequency selectivity after surgical removal of both cochleae. Characteristic neuronal frequencies were evident in the following three measures. i) The cells fired spontaneously with discrete preferred interspike intervals; ii) Impulse responses of these neurons to electrical stimuli of cochlear nerves displayed oscillations at the preferred frequencies; iii) When the cochlear nerves were stimulated with a random pulse sequence, a reverse correlation analysis showed that the cells preferred the same frequencies in the stimulus input. Preferred frequencies observed thus far covered over 4 octaves of the auditory range. These "oscillating cells" were found only in a small rostromedial area in the IC. Neuronal frequency selectivity may serve a temporal analysis of sound and underlie sound identification with certain cochlear implants. It may also support interaural crosscorrelation necessary for directional hearing.
在双侧耳蜗手术切除后，鸡下丘（IC）中的一组神经元表现出频率选择性。在以下三种测量中，特征性神经元频率很明显。i）这些细胞以离散的偏好峰峰间期自发放电；ii）这些神经元对耳蜗神经电刺激的冲动反应在偏好频率处表现出振荡；iii）当用随机脉冲序列刺激耳蜗神经时，反向相关分析表明，这些细胞在刺激输入中偏好相同的频率。迄今为止观察到的偏好频率覆盖了听觉范围的4个多倍频程。这些“振荡细胞”仅在IC的一个小的嘴内侧区域中发现。神经元频率选择性可能有助于声音的时间分析，并成为某些人工耳蜗进行声音识别的基础。它也可能支持定向听觉所需的双耳互相关。
