DISTRIBUTION OF SYNAPSES ON 2 ASCENDING INTERNEURONS CARRYING FREQUENCY-SPECIFIC INFORMATION IN THE AUDITORY-SYSTEM OF THE CRICKET - EVIDENCE FOR GABAERGIC INPUTS
DISTRIBUTION OF SYNAPSES ON 2 ASCENDING INTERNEURONS CARRYING FREQUENCY-SPECIFIC INFORMATION IN THE AUDITORY-SYSTEM OF THE CRICKET - EVIDENCE FOR GABAERGIC INPUTS
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DOI：
10.1002/cne.903450402
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发表时间：
1994-07-22
影响因子：
2.5
通讯作者：
WATSON, AHD
中科院分区：
文献类型：
--
作者：
HARDT, M;WATSON, AHD
两个确定的蟋蟀听觉神经元，AN 1和AN 2，细胞内标记辣根过氧化物酶的生理特性。这些神经元在结构上有一些相似之处，它们的胞体位于前胸神经节和轴突中，轴突投射到大脑。虽然两者都携带听觉信息，但它们具有不同的反应特性，并参与不同类型的声定向行为。超薄切片从选定地区的prothoracic arborisations进行检查后，在电子显微镜下的抑制性递质GABA的免疫染色。在前胸神经节中，AN 1仅在索马对侧的内侧腹侧联合中心（mVAC）分支，并且仅接收输入突触。其中27%是由GABA免疫反应过程产生的。AN 2不仅在神经节两侧的mVAC中分支，而且还在其他几个区域中分支。它从神经节两侧mVAC中的大直径神经突以及神经堆更后部区域的神经突产生输出突触。大多数输入突触被接收到对侧mVAC中的分支上，其中约19%由GABA免疫反应性过程制成（C）1994 Wiley-Liss，Inc.
Two identified cricket auditory interneurones, AN1 and AN2, were intracellularly labelled with horseradish peroxidase following physiological characterisation. The neurones, which have some structural similarities, have their somata in the prothoracic ganglion and axons that project to the brain. Although both carry auditory information, they have different response properties and participate in different types of phonotactic behaviour. Ultrathin sections from selected regions of their prothoracic arborisations were examined in the electron microscope after postembedding immunostaining for the inhibitory transmitter GABA. In the prothoracic ganglion AN1 branches only in the medial ventral association centre (mVAC) contralateral to the soma, and receives only input synapses. Twenty-seven percent of these were made by processes immunoreactive for GABA. AN2 branches not only in mVAC on both sides of the ganglion but also in several other areas. It makes output synapses from large diameter neurites in mVAC on both sides of the ganglion as well as from neurites in more posterior regions of the neuropile. Most input synapses are received onto branches in the contralateral mVAC where about 19% were made from GABA-immunoreactive processes, (C) 1994 Wiley-Liss, Inc.