Gonzalez M J, Anadon R
Universidad de La Coruña, Departamento de Biología Celular y Molecular, Spain.
J Hirnforsch. 1992;33(2):185-94.
The primary central projections of the anterior and posterior lateral line nerves were determined in the larval sea lamprey, Petromyzon marinus L. using silver staining methods and axonal transport of horseradish peroxidase (HRP). Lateral line fibers course in the dorsal portion of the octavolateral area. At the level of their entry in the medulla, all the lateral line fibers originate ascending and descending branches. The anterior lateral line nerve consists of three roots: dorsal, intermediate and ventral. Afferents of the dorsal root project to the ipsilateral dorsal nucleus. The intermediate and ventral roots project ipsilaterally to the lateral neuropil of the medial nucleus and to the cerebellar lamina, but they do not cross the midline. Contralateral projections of this nerve were not found in larvae. Primary afferents of the posterior lateral line nerve project ipsi- and contralaterally to the medial neuropil of the medial nucleus. Ascending fibers course in the ipsilateral medial nucleus, enter the cerebellar lamina, cross the midline and descend to the lateral neuropil of the contralateral medial nucleus. In the cerebellar lamina, the fibers of the anterior lateral nerve are located ventrolaterally to those of the posterior lateral nerve. Lateral line efferents were not observed in larvae.
利用银染法和辣根过氧化物酶（HRP）轴突运输技术，确定了海七鳃鳗幼体（Petromyzon marinus L.）前侧线神经和后侧线神经的主要中枢投射。侧线纤维走行于八分体外侧区的背侧部分。在其进入延髓的水平，所有侧线纤维都发出升支和降支。前侧线神经由三根神经根组成：背根、中间根和腹根。背根的传入纤维投射到同侧的背核。中间根和腹根同侧投射到内侧核的外侧神经毡和小脑板，但它们不交叉中线。在幼体中未发现该神经的对侧投射。后侧线神经的初级传入纤维同侧和对侧投射到内侧核的内侧神经毡。升支纤维在同侧内侧核走行，进入小脑板，交叉中线并下行至对侧内侧核的外侧神经毡。在小脑板中，前侧线神经的纤维位于后侧线神经纤维的腹外侧。在幼体中未观察到侧线传出纤维。
