大鼠的中枢听觉传导时间。

Central auditory conduction time in the rat.

作者信息

Shaw N A

机构信息

Department of Physiology, School of Medicine, University of Auckland, New Zealand.

出版信息

Exp Brain Res. 1990;79(1):217-20. doi: 10.1007/BF00228892.

DOI:10.1007/BF00228892

PMID:2311700

Abstract

Central conduction time is the time for an afferent volley to traverse the central pathways of a sensory system. In the present study, central auditory conduction time (CACT) was calculated for the rat, the first such formal measurement in any animal. Brainstem auditory evoked potentials (BAEPs) were recorded simultaneously with the primary response of the auditory cortex (P1). The latency of wave II of the BAEP, which arises in the cochlear nucleus, was subtracted from that of P1. This yielded a mean CACT of 6.6 ms. The results confirm a previous theoretical estimate that CACT in the rat is at least twice as long as central somatosensory conduction time.

摘要

中枢传导时间是传入冲动穿越感觉系统中枢通路所需的时间。在本研究中，计算了大鼠的中枢听觉传导时间（CACT），这是在任何动物中首次进行的此类正式测量。同时记录脑干听觉诱发电位（BAEP）和听觉皮层的初级反应（P1）。从P1的潜伏期减去起源于蜗神经核的BAEP的II波潜伏期。得出平均CACT为6.6毫秒。结果证实了先前的理论估计，即大鼠的CACT至少是中枢体感传导时间的两倍。