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Cooperative acoustic and auditory study on tree shrew

树鼩的声学和听觉合作研究

基本信息

批准号：
05044142
负责人：
KAMEDA Kazuo
金额：
$ 3.52万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

项目摘要

The purpose of this project is to make a catalog of the vocalization and to characterize the neurons of inferior colliculus and auditory cortex in the tree shrew (Tupaia belangeri chinensis), which is specific in the evolutionary point of view as primitive primates. A partner, Dr.Xinde Sun, has studied on the auditory system of the animal collected in the southern China, to which we joined for collaboration.The vocalization was analyzed first. One of the investigators visited Shanghai and recorded the vocalization in the sound proof room. The vocalization was recorded from female alone, male alone or from male and female in the analog tape and digitized by computer. The three kinds of vocalization were recognized, one of which was emiteed most often. The sound is composed of 6 to 7 syllables and emitted seriously, which is very specific to the animal. The digitized files were analyzed furthermore in Hong Kong, into which Kamada participated. Totally 500 sounds were analyzed and statistically divided based upon the durations, frequencies and frequency change with time. The result suggested there are two groups in the sounds, correspondingly to female and male. The fact is examined again this year. But there were limitations in laboratory condition to make clear that there are no more vocalizations other than 3 compared to natural condition.The sexual dimorphism was examined further in our laboratory with Dr.Sun invited here using KAY sonagraph. The careful analysis indicated the dimorphism in frequency and frequency change.Neurophysiological experiments were tried in inferior colliculus. Neurons were examined in basic properties and FM sensitivity. There was a difficulty in accessing the electrode to inferior colliculus because of overlapped superior colliculus on it. The basic responsibility and FM sensitive were similar to other mammals. Then we examined the auditory cortex.

本项目的目的是对树鼩（Tupaia belangeri chinensis）的发声进行分类，并对其下丘和听觉皮层的神经元进行表征。我们的合作伙伴孙信德博士对中国南方采集的动物的听觉系统进行了研究，我们加入了合作。首先对发声进行分析。其中一名调查人员访问了上海，并在隔音室录制了发声。用模拟磁带记录女性单独发声、男性单独发声或男性和女性的发声，并用计算机进行数字化处理。识别出三种发声方式，其中一种是最常发出的。这种声音由6到7个音节组成，发出的声音很严肃，这是动物特有的。这些数字化文件在香港进行了进一步的分析，Kamada也参与了其中。根据持续时间、频率和频率随时间的变化对500个声音进行分析和统计。结果表明，声音中有两组，对应于雌性和雄性。这一事实今年再次被审视。但在实验室条件下，与自然条件相比，没有更多的发声，这是有局限性的。在孙博士的邀请下，我们的实验室用KAY超音波进一步检查了性别二态性。仔细分析表明，频率和频率变化具有二态性。下丘进行神经生理学实验。观察神经元的基本特性和调频敏感性。由于上丘与下丘重叠，电极难以进入下丘。基本责任和调频敏感性与其他哺乳动物相似。然后我们检查了听觉皮层。