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Functional assignment of glomeruli and projection interneurons of antennal lobe in insect brain

昆虫脑中触角叶肾小球和投射中间神经元的功能分配

基本信息

批准号：
06640889
负责人：
YOKOHARI Fumio
金额：
$ 1.54万
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：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

We have identified the regions where the hygro- and thermoreceptor neurons and mechanoreceptor neurons terminated. For the hygro- and thermoreceptor neurons the neurons were ionophoritically stained by cobalt from the sensilla, one of which contained two hygroreceptors, one cold receptor and the fourth cell and the other contained one cold receptor and a few olfactory receptor cells. A neuron in the hygro- and thermoreceptive sensillum and a neuron in the thermoreceptive and olfactory sensillum terminate in a cluster of glomeruli which located near a dorsal lobe. Two other neurons in the hygro- and thermoreceptive sensilla also terminated in another cluster of glomeruli in the same region. Each of these clusters appears to form a complex of glomeruli similar to the macroglomerular complex of male moths. On the other hand, the projection neurons that respond strongly to hygro- or thermal stimulations have dendritic arborizations in these glomerular clusters but the projection neurons show weak responses to these stimulations appear to terminate in other glomeruli. Therefore, humidity and temperature information appears to be primarily transmitted to the particular projection interneurons through these glomerular clusters, respectively. The mechanoreceptor neurons were also stained in the same method from mechanoreceptive sensilla. The neurons passed through the dorsal lobe and the tritocerebrum and terminated in suboesophageal ganglion. This pass way was very similar to that of the fourth neuron in the hygro- and thermoreceptive sensilla.

我们已经确定了水分和热感受器神经元和机械感受器神经元终止的区域。对于湿感受器和热感受器神经元，神经元被来自感受器的钴离子染色，其中一个包含两个湿感受器，一个冷感受器和第四个细胞，另一个包含一个冷感受器和几个嗅觉感受器细胞。水感和热感器中的一个神经元以及热感和嗅觉感器中的一个神经元在靠近背叶的肾小球丛中终止。湿热感觉器中的另外两个神经元也终止于同一区域的另一组肾小球。这些团簇中的每一个似乎都形成了肾小球复合物，类似于雄性飞蛾的大肾小球复合物。另一方面，对湿热刺激反应强烈的投射神经元在这些肾小球簇中有树突状树突，但对这些刺激反应弱的投射神经元似乎在其他肾小球中终止。因此，湿度和温度信息似乎主要分别通过这些肾小球簇传递给特定的投射中间神经元。机械感觉器的机械感受神经元也用同样的方法染色。神经元穿过背叶和三脑，终止于食道下神经节。这种传递方式与湿热感觉器中第四个神经元的传递方式非常相似。