Watkins B L, Burrows M, Siegler M V
J Comp Neurol. 1985 Oct 15;240(3):233-55. doi: 10.1002/cne.902400303.
The morphology of eight nonspiking local interneurones in the metathoracic ganglion of the locust is described in relation to known tracts, commissures, regions of neuropile, and identified motor neurones. They are compared with the spiking local interneurones in the same ganglion. Each nonspiking local interneurone was injected intracellularly with cobalt, following characterization of its physiological effects on identified leg motor neurones. The shapes of the nonspiking interneurones are diverse, although all have processes restricted to one ganglion and lack an axon. Their cell bodies are distributed in the ventral and dorsal cortex of the ganglion. Interneurones with cell bodies in similar places have similar basic structures, with primary neurites in the same commissure or tract, and major branches in the same tracts. The fine branches of all the interneurones have the same texture throughout, and occur in the same lateral region of neuropile, dorsal to the prominent neurite of the fast extensor tibiae motor neurone. Some interneurones have branches that extend both to the midline and to the dorsal boundary of the neuropile, but none have branches in the ventral, medial neuropile. This distribution of branches corresponds with two known features of the physiology of these interneurones: they make what appear physiologically to be direct connections with motor neurones, and have branches in the same region of the neuropile as the motor neurones. They do not appear to receive direct inputs from hair afferents, and they have no branches in the ventral neuropile to which these afferents project.
本文描述了蝗虫后胸神经节中8个非爆发性局部中间神经元的形态，这些形态与已知的神经束、连合、神经纤维网区域以及已识别的运动神经元相关。将它们与同一神经节中的爆发性局部中间神经元进行了比较。在确定了每个非爆发性局部中间神经元对已识别的腿部运动神经元的生理影响后，对其进行了细胞内钴注射。尽管所有非爆发性中间神经元的突起都局限于一个神经节且没有轴突，但其形态各异。它们的细胞体分布在神经节的腹侧和背侧皮质。细胞体位于相似位置的中间神经元具有相似的基本结构，其初级神经突位于同一连合或神经束中，主要分支位于同一神经束中。所有中间神经元的细分支在整个区域具有相同的质地，并且出现在神经纤维网的同一外侧区域，位于快速伸胫运动神经元突出神经突的背侧。一些中间神经元的分支既延伸到神经纤维网的中线，也延伸到其背侧边界，但没有一个在腹侧内侧神经纤维网中有分支。这种分支分布与这些中间神经元生理学的两个已知特征相对应：它们在生理上似乎与运动神经元直接相连，并且在与运动神经元相同的神经纤维网区域有分支。它们似乎没有从毛状传入神经元接收直接输入，并且在这些传入神经元投射的腹侧神经纤维网中没有分支。
