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付子英,唐佳,JEN Philip Hung-Sun,陈其才.2009.大蹄蝠回声定位信号特征与下丘神经元频率调谐.动物学杂志,44(1):128-132.

大蹄蝠回声定位信号特征与下丘神经元频率调谐

Spectrum Characteristics of Echolocation Call and Frequency Tuning of Inferior Collicular Neurons in Hipposideros armiger

投稿时间：2008-08-09 修订日期：2008-11-12

DOI：

中文关键词: 回声定位信号下丘神经元频率调谐大蹄蝠

英文关键词:Echolocation call Inferior collicular neurons Frequency tuning Hipposideros armiger

基金项目:国家自然科学基金项目(No.30670695);美国密苏里大学生物科学系基金项目

作者	单位	E-mail
付子英	华中师范大学生命科学学院遗传调控与整合生物学湖北省重点实验室武汉 430079	qcchen2003@yahoo.com.cn
唐佳	华中师范大学生命科学学院遗传调控与整合生物学湖北省重点实验室武汉 430079
JEN Philip Hung-Sun	Division of Biological Sciences and Interdisciplinary Neuroscience Program,University of Missouri2Columbia,MO 65211,USA
陈其才	华中师范大学生命科学学院遗传调控与整合生物学湖北省重点实验室武汉 430079

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中文摘要:

采用超声监测仪录制超声信号和细胞外电生理记录下丘神经元的频率调谐曲线(frequency tuning curves,FTCs)的方法,探讨了大蹄蝠(Hipposideros armiger)回声定位信号与下丘(inferior colliculus,IC)神经元频率调谐之间的相关性。结果发现,大蹄蝠回声定位叫声为恒频-调频(constant frequency-frequency modulated,CF-FM)信号,一般含有2～3个谐波,第二谐波为其主频,CF成分频率(Mean±SD,n=18)依次为:(33.3±0.2)、(66.5±0.3)、(99.4±0.5)kHz;电生理实验共获得72个神经元的频率调谐曲线,Q10-dB值的范围是0.5～95.4(9.2±14.6,n=72),最佳频率(best frequency,BF)在回声定位主频附近的神经元具有尖锐的频率调谐特性。结果表明,大蹄蝠回声定位信号与下丘神经元频率调谐存在相关性,表现为最佳频率在回声定位信号主频附近的神经元频率调谐曲线的Q₁₀-dB值较大,具有很强的频率分析能力。

英文摘要:

In order to explore the relationship between the echolocation call or signal of leaf-nosed bats (Hipposideros armiger) and frequency tuning of inferior collicular neurons, the echolocation calls of the leaf-nosed bats were recorded using bat detector and frequency tuning curves (FTCs) of inferior collicular (IC) neurons were obtained by extracellular recording. The results showed that the echolocation calls of the leaf-nosed bats were constant frequency-frequency modulation (CF-FM) signals with 2-3 harmonics and the second one among these three harmonics was its dominant frequency. The constant frequency (CF) components of three harmonics (Mean±SD,n=18 ) were 33.3±0.2 kHz, 66.5±0.3 kHz, and 99.4±0.5 kHz, respectively. In examined FTCs of 72 IC neurons, their Q₁₀ -dB values ranged from 0.5 to 95.4 (9.2±14.6) and the neurons whose best frequency (BF) around the dominant frequency had sharp frequency tuning. Thus, the neurons with sharp frequency tuning and high Q₁₀ -dB values showed that there was certain relationship between echolocation call and frequency tuning of IC neurons in the leaf-nosed bats.

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