Gilat E, Hall D H, Bennett M V
Brain Res. 1986 Feb 12;365(1):96-104. doi: 10.1016/0006-8993(86)90726-2.
In the medulla of the hatchetfish each Mauthner fiber forms chemical synapses on a number of large myelinated axons termed giant fibers. The giant fibers form rectifying electrotonic synapses on pectoral fin adductor motoneurons, and in this fish bilateral pectoral fin adduction is an important component of the Mauthner fiber-mediated escape reflex. The branching patterns of giant fibers were determined by intracellular injection of Lucifer yellow. Dye coupling to the motoneuron somata was not observed, although a low level of transfer might have been obscured by autofluorescence. Individual giant fibers terminate primarily on pectoral fin motoneurons contralateral to their cell bodies, but may also send a branch back across the midline to ipsilateral motoneurons. The rostral process of each giant fiber ends on neurons presumably associated with cranial musculature. The number and geometry of the pectoral fin motoneurons were determined using Golgi and Nissl staining and serial reconstruction methods.
在斧鱼的延髓中，每条莫特纳尔纤维在许多被称为巨纤维的大型有髓轴突上形成化学突触。巨纤维在胸鳍内收运动神经元上形成整流电突触，在这种鱼中，双侧胸鳍内收是莫特纳尔纤维介导的逃避反射的一个重要组成部分。通过细胞内注射路西法黄来确定巨纤维的分支模式。尽管可能由于自发荧光而掩盖了低水平的染料转移，但未观察到染料与运动神经元胞体的耦合。单个巨纤维主要终止于与其细胞体相对侧的胸鳍运动神经元，但也可能发出一个分支穿过中线至同侧运动神经元。每条巨纤维的吻侧突起终止于可能与颅部肌肉组织相关的神经元上。使用高尔基染色法和尼氏染色法以及连续重建方法确定胸鳍运动神经元的数量和几何结构。
