FM成分对CF-FM蝙蝠下丘神经元恢复周期的作用  

Effects of FM Component on the Recovery Cycle of Inferior Collicular Neurons in CF-FM Bat

作　　者：唐佳[1] 付子英[1] Jen Philip Hung-Sun 陈其才[1] 

机构地区：[1]华中师范大学生命科学学院和遗传调控与整合生物学湖北省重点实验室,武汉430079 [2]Division of Biological Sciences and Interdisciplinary Neuroscience Program,University of Missouri-Columbia

出　　处：《听力学及言语疾病杂志》2009年第1期55-57,共3页Journal of Audiology and Speech Pathology

基　　金：国家自然科学基金(30670695);美国密苏里大学生物科学系基金的资助

摘　　要：目的探讨调频(frequency-modulated,FM)成分在恒频/调频(constant frequency-frequency mod-ulation,CF-FM)蝙蝠下丘(inferior colliculus,IC)神经元恢复周期中的作用。方法在5只听力正常的大蹄蝠IC记录单个神经元的反应及CF和CF-FM声刺激模式下的神经元恢复周期曲线。结果以CF刺激条件下的恢复周期曲线为对照,CF-FM声刺激使大部分神经元恢复周期缩短(49.1%,P<0.001),少部分延长(38.2%,P<0.001),极少部分不发生变化(12.7%,P>0.05)。结论回声定位信号中的FM成分在CF-FM蝙蝠缩短恢复周期以处理高重复率的回声信息方面显得尤为重要,有利于CF-FM蝙蝠IC神经元对高重复率回声的分析。Objective To investigate the effects of FM component on the recovery cycle of inferior collicular neurons in CF-FM bats. Methods Obtained were the responses of inferior collicular neurons and recovery cycles of these neurons under CF and CF-FM acoustic stimuli in five adult leaf-nosed bats, Hipposideros armiger with normal hearing. Results The control was tested with recovery cycles obtained under CF stimulation conditions, observed were three different effects of CF-FM on recovery cycles of IC neurons： reduced （49. 1%, P〈0. 001）, prolonged （38.20%,P〈0. 001）, and no effect （ 12.7 %, P〉0.05）. Conclusion The result demonstrated that FM component of echolocation signal of the bat played an important role in decreasing recovery cycle for processing high pulsed repetitions,was helpful to the analysis of the high repetitions of echoes in IC neurons of CF-FM bats.

关 键 词：FM成分 下丘神经元 恢复周期 CF—FM蝙蝠 

分 类 号：R764.4[医药卫生—耳鼻咽喉科]