Poon P W, Yu P P
Department of Physiology, Medical College, National Cheng Kung University, Taiwan, Republic of, Tainan, China.
Neurosci Lett. 2000 Jul 28;289(1):9-12. doi: 10.1016/s0304-3940(00)01251-9.
Single unit responses at the auditory midbrain of the anesthetized rat were characterized in terms of spectro-temporal receptive field (STRF) using random frequency modulated (FM) tones and peri-spike averaging. STRFs were obtained from 121 FM-sensitive units covering a wide range of characteristic frequency (CF). Roughly half of the neurons showed clearly preferred stimulus time profiles that formed either a single, double or multiple bands. Neurons with a single-band STRF appeared to be sorted into positive or negative directional sensitivity for FM modulation on the basis of their CF either below or above 10 kHz. This directional selectivity is discussed in relation to the most sensitive part of the rat's audiogram.
使用随机调频（FM）音和峰电位周围平均法，根据频谱-时间感受野（STRF）对麻醉大鼠听觉中脑的单神经元反应进行了表征。从121个对FM敏感的神经元获得了STRF，这些神经元覆盖了广泛的特征频率（CF）范围。大约一半的神经元表现出明显偏好的刺激时间分布，形成了单带、双带或多带。根据其CF低于或高于10kHz，具有单带STRF的神经元似乎被分类为对FM调制的正或负方向敏感性。结合大鼠听力图最敏感的部分讨论了这种方向选择性。
