Burrows M, Watkins B L
J Comp Neurol. 1986 Mar 1;245(1):29-40. doi: 10.1002/cne.902450103.
Two bilaterally symmetrical groups of spiking local interneurones have been characterized in the mesothoracic ganglion of the locust. The cell bodies of one group, the "midline group," lie at the ventral midline. Their primary neurites run in the ventral loop of ventral commissure II to form extensive branches in the neuropile of one-half of the ganglion. A dorso-ventral process in the perpendicular tract links two distinct fields of branches, one ventral and consisting of numerous fine branches of a uniform texture that arise from stout secondary neurites, and the other more dorsal consisting of fewer branches of a varicose appearance. Cell bodies of the second, the "anterior-lateral" group, lie close to the lateral edge of an anterior connective. Their primary neurites run in a more anterior ventral commissure and their neuropilar branches are divided into two fields by a process in a more anterior dorso-ventral tract. Within the two groups, each interneurone has its own distinctive shape that is an elaboration on these basic plans. Each interneurone also has its own characteristic physiology, being excited by a particular array of mechanoreceptors on the middle leg on the same side of the body as its neuropilar branches. The receptive fields of the interneurones, defined in this way, can be extensive and cover a particular surface of all parts of the leg, or restricted to one surface of, for example, the tarsus. These interneurones therefore bear a striking resemblance to two groups of spiking local interneurones in the adjacent segmental ganglion of the metathorax.
在蝗虫的中胸神经节中，已鉴定出两组呈双侧对称的爆发性局部中间神经元。其中一组，即“中线组”，其细胞体位于腹侧中线。它们的初级神经突在腹侧连合II的腹侧环中延伸，在神经节一侧的神经纤维网中形成广泛的分支。垂直束中的背腹向突起连接两个不同的分支区域，一个位于腹侧，由粗壮的次级神经突发出的许多质地均匀的细分支组成，另一个位于更背侧，分支较少，呈曲张状。第二组，即“前外侧”组，其细胞体靠近前连合的外侧边缘。它们的初级神经突在前侧腹侧连合中延伸，其神经纤维网分支被前侧背腹向束中的一个突起分为两个区域。在这两组中，每个中间神经元都有其独特的形状，这是在这些基本模式上的一种细化。每个中间神经元也有其独特的生理特性，由其神经纤维网分支所在身体同侧中腿上特定的一组机械感受器激发。以这种方式定义的中间神经元的感受野可以很广泛，覆盖腿部所有部位的特定表面，或者局限于例如跗节的一个表面。因此，这些中间神经元与后胸相邻节段神经节中的两组爆发性局部中间神经元有着惊人的相似之处。
