Newland P L
Department of Zoology, University of Cambridge, England.
J Comp Neurol. 1990 Sep 8;299(2):242-60. doi: 10.1002/cne.902990208.
A population of ascending interneurones with cell bodies in the metathoracic ganglion of the locust is described. Interneurones are characterised by their morphology (revealed by intracellular cobalt injection) and by their physiological responses to afferent stimulation. All interneurones have their somata in the ventral cortex of the ganglion, in an area just posterior to the medial tracheae. On the basis of gross morphology the interneurones can be divided into three groups: (1) those that have a main area of fine neurites ipsilateral to the soma and an ipsilateral ascending axon; (2) interneurones that also have their main neurites ipsilateral to the soma but have a contralateral ascending axon, and (3) interneurones that have their main stimulation of sensory receptors on the hind leg ipsilateral to the main neurites. Interneurones receiving excitatory inputs from tactile hairs on the hind leg have branches in the most ventral neuropil, whereas interneurones receiving input from leg proprioceptors have branches in the more intermediate and dorsolateral neuropil. The branching pattern of an interneurone and the size and position of the receptive field on the leg are correlated. Interneurones with restricted branching patterns have restricted receptive fields. The position of the ventral branching reflects the position of the receptive field on the leg. An interneurone with a receptive field restricted to the femur has ventral branches in an anterior position in the ganglion; an interneurone with a receptive field restricted to the tarsus has ventral branches in a more posterior position.
本文描述了一群细胞体位于蝗虫后胸神经节的上行中间神经元。中间神经元通过其形态（通过细胞内钴注射显示）及其对传入刺激的生理反应来表征。所有中间神经元的胞体都位于神经节的腹侧皮质，在内侧气管后方的一个区域。根据大体形态，中间神经元可分为三组：（1）那些在胞体同侧有一个主要的细神经突区域和一条同侧上行轴突的神经元；（2）同样在胞体同侧有主要神经突但有一条对侧上行轴突的中间神经元，以及（3）其主要神经突同侧的后肢上的感觉受体受到主要刺激的中间神经元。从后肢触觉毛接收兴奋性输入的中间神经元在最腹侧的神经纤维网中有分支，而从腿部本体感受器接收输入的中间神经元在更中间和背外侧的神经纤维网中有分支。中间神经元的分支模式与腿部感受野的大小和位置相关。具有受限分支模式的中间神经元具有受限的感受野。腹侧分支的位置反映了腿部感受野的位置。一个感受野局限于股骨的中间神经元在神经节的前部有腹侧分支；一个感受野局限于跗骨的中间神经元在更靠后的位置有腹侧分支。
