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Physiological and morphological study on neural processing of humidity, temperature and other model sensory information in insect brain.

昆虫大脑对湿度、温度等模式感觉信息神经处理的生理形态学研究。

基本信息

批准号：
04640678
负责人：
YOKOHARI Fumio
金额：
$ 1.34万
依托单位：
Fukuoka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

项目摘要

We have already elucidated the primary process of hygroreceptors, the response characteristics of thermal (cold) receptors and the response spectra of antennal olfactory receptors in cockroach, Periplaneta americana. Furthermore, we have investigated the hygro- and thermal information processing in the antennal lobe within the deutocerebrum of cockroach Periplaneta and honeybee Apis, showing that functional and morphological characteristics of some interneurons in the antennal lobe which are involved in neural processing of hygro- and thermal information. In this study we have identified the glomeruli where the axons of the hygro- or themoreceptors terminated and which the projection interneurons innervated, in order to elucidate the sites of integration of the hygro- and thermal information with other modal information from antennal receptors.1. The receptor axons were ionophoritically stained by cobalt from the sensilla one of which contained twe hygroreceptors, one cold receptor and the other cell and the other of which contained one cold receptor and a few olfactory receptor cells. An axon of the receptor cell in the hygro- and thermoreceptive sensillum and an axon of the receptor cells in the thermoreceptive and olfactory sensillum terminated in glomeruli which located near a dorsal lobe. Twe axons of the receptors in the hygro- and themoreceptive sensilla also terminated in glomeruli in the region. However, terminals of other axons were divergent. Therefore we concluded that the axons of the hygroreceptors and thermoreceptors terminated in the special glomeruli near the dorsal lobe.2. The projection interneurons which responded to humidity or temperature changes had arborizations in glomeruli which located near the dorsal lobe. However we could not whether these glomeruli were the same glomeruli where the axons of the cold receptors or hygroreceptors terminated.

我们已经阐明了美洲大蠊（Periplaneta americana）的湿感受器的初级过程、热（冷）感受器的反应特性和触角嗅觉感受器的反应谱。此外，我们还研究了蟑螂和蜜蜂中脑触角叶对温湿信息的处理，揭示了触角叶中参与温湿信息神经处理的中间神经元的功能和形态特征。在这项研究中，我们已经确定了肾小球的湿或热感受器的轴突终止和投射中间神经元支配，以阐明的网站整合的湿和热的信息与其他模式的信息从触角受体。感受器轴突被钴离子染色，其中一个感受器含有两个湿感受器，一个冷感受器和另一个细胞，另一个含有一个冷感受器和一些嗅觉感受器细胞。温感器和温感器中的感受细胞的轴突和嗅感器和温感器中的感受细胞的轴突终止于肾小球，位于背叶附近。两个轴突的受体在湿度和热感受器也终止于肾小球在该地区。而其他轴突的终末则呈发散状。因此，我们认为，在背叶附近的特殊肾小球中，是湿度感受器和温度感受器的轴突终止的地方.对湿度或温度变化有反应的投射中间神经元在靠近背叶的肾小球内有分支。然而，我们不能确定这些肾小球是否是冷感受器或湿感受器轴突终止的同一个肾小球。