Arbas E A
J Comp Neurol. 1983 Jun 1;216(4):381-9. doi: 10.1002/cne.902160404.
Comparison of the nervous systems of a flightless grasshopper (Barytettix psolus), and locusts (Schistocerca) is extended to include two large interneurons, the descending contralateral movement detector (DCMD) and the tritocerebral commissure giant (TCG). These interneurons are thought to play a role in locust flight. Both were visualized in Barytettix with cobalt staining techniques. Most features of the two neurons are similar in both locusts and Barytettix. Yet, several differences were noted. In locusts, the dorsal DCMD branch in its metathoracic projection terminates in dorsolateral neuropile and synapses with flight motorneurons (Pearson and Goodman, '79). In Barytettix, no branch terminates in the corresponding region. Of the animals examined, 52% lacked branches corresponding to locust dorsal branches. When present, they all had abnormal projections by comparison to their counterparts in locusts. The maintenance of the TCG in Barytettix with so similar a form to that of locusts suggests that the role of the cell in behavior other than flight should be examined. The differences in DCMD projection suggest that a discrete set of output connections may have been modified in Barytettix by the alteration of a single first-order axonal branch.
对一种不会飞的蚱蜢（Barytettix psolus）和蝗虫（Schistocerca）的神经系统比较进行了扩展，纳入了两个大型中间神经元，即下行对侧运动探测器（DCMD）和后脑连合巨神经元（TCG）。这些中间神经元被认为在蝗虫飞行中发挥作用。二者在Barytettix中均通过钴染色技术得以可视化。这两种神经元的大多数特征在蝗虫和Barytettix中是相似的。然而，也注意到了一些差异。在蝗虫中，其在后胸投影中的背侧DCMD分支终止于背外侧神经纤维网，并与飞行运动神经元形成突触（Pearson和Goodman，1979年）。在Barytettix中，没有分支终止于相应区域。在所检查的动物中，52%缺乏与蝗虫背侧分支相对应的分支。当存在这些分支时，与蝗虫中的对应分支相比，它们都有异常的投影。Barytettix中TCG以与蝗虫如此相似的形式存在，这表明该细胞在飞行以外行为中的作用值得研究。DCMD投影的差异表明，在Barytettix中，可能通过单个一级轴突分支的改变，一组离散的输出连接发生了改变。
