Acoustic response properties of single neurons in the central posterior nucleus of the thalamus of the goldfish, Carassius auratus
Acoustic response properties of single neurons in the central posterior nucleus of the thalamus of the goldfish, Carassius auratus
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金鱼丘脑后中央核单个神经元的声响应特性
DOI：
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
R. Fay
中科院分区：
文献类型：
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作者：
Z. Lu;R. Fay
记录了丘脑中央后核（CP）单个神经元的细胞外声反应。CP神经元的自发活动、最佳灵敏度和调谐锐度（Q10db）分别为0 ~ 36个尖峰/秒、-40 ~ 5个尖峰/秒、0.18 ~ 1.80个尖峰/秒。特征频率（CF）分布不均匀，模态为195 Hz。根据刺激前后时间和峰间直方图，将60个CP神经元的时间反应模式分为三组：相位型（25%）、强直型（22%）和强直型（53%）。大多数CP神经元（90%）没有锁相，也没有强锁相。CP神经元在自发率、最佳灵敏度、非均匀CF分布和表现出与水平无关的最佳频率等方面与中脑半圆形神经元相似。CP和总神经元都表现出与哺乳动物中枢听觉系统相似的反应模式的多样性。但CP神经元的调谐范围较宽，锁相能力较弱，提示其在听觉加工中的作用不同。虽然中脑水平的外周频率分析得到增强，但丘脑中频率选择通道的整合可能在处理自然声源的宽带频谱特征中起作用。
Acoustic responses were recorded extracellularly from single neurons in the thalamic central posterior nucleus (CP). Spontaneous activity, best sensitivity, and sharpness of tuning (Q10db) of CP neurons ranged from 0 to 36 spikes/s, -40 to 5 dB re: 1 dyne/cm2, and 0.18 to 1.80, respectively. The distribution of characteristic frequency (CF) was nonuniform with a mode at 195 Hz. Temporal response patterns of CP neurons (N = 60) were categorized into three groups: phasic (25%), tonic chopper-like (22%), and tonic nonchopper-like (53%) on the basis of peri-stimulus time and inter-spike interval histograms. Most CP neurons (90%) did not phase-lock to tones, and none phase-locked strongly. The properties of CP neurons are similar to those of the midbrain torus semicircularis neurons in spontaneous rates, best sensitivities, nonuniform CF distributions, and in exhibiting level-independent best frequencies. Both CP and toral neurons show a diversity of response patterns resembling those found in the mammalian central auditory system. However, CP neurons have broader tuning and less phase-locking than toral neurons, suggesting different roles in auditory processing. While peripheral frequency analysis is enhanced at the midbrain level, the integration of frequency-selective channels in the thalamus may function in the processing of wideband spectra characteristic of natural sound sources.
发声鱼的中枢听觉神经生理学：Pollimyrus isidori（Mormyridae）的中脑。
DOI：
10.1007/bf00189392
发表时间：
1993
期刊：
Journal of comparative physiology. A, Sensory, neural, and behavioral physiology
影响因子：
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作者：
Crawford,JD
通讯作者：
Crawford,JD