鳜脑干组织学与重建研究

HISTOLOGY AND REBUILDING OF THE BRAIN STEM FOR THE MANDARIN FISH SINIPERCA CHUATSI (BASILEWSKY)

采用银浸染、美蓝及H.E染色技术对5尾鳜成鱼的脑干进行了组织学研究，并在此基础上对其各主要神经核团及神经束空间构型及走向进行了探讨，旨在为研究鳜脑的功能提供基础性资料。鳜脑干结构与其它硬骨鱼相似，囊括了除第1对脑神经之外的9对脑神经中枢。并且感觉中枢多集中于脑干背侧；运动中枢集中于脑干腹侧．脑干视盖、Ⅲ、Ⅳ及Ⅵ核都比较发达，听结节明显，平衡区Ⅷ核范围广泛，说明视觉、侧线感觉在其（摄食）行为中有不可低估的作用。脑干迷走叶隆起，Ⅸ、Ⅹ感觉区范围也较大，Ⅶ核出现早，占据第4脑室侧壁大部分区域，说明味觉在其摄食活动中也有不可忽略的作用。

The five brain stems of the mandar in fish, Siniperca chuatsi, were examined by means of silver－impregnation methylene-blue and H.E staining. There are centers of nine pairs of cranial nerves except the first pair of oranial nerve in the bain stem. Their sensory centers were generally located in the dorsal areas of the bain stem, and the motorial centers in the ventral areas. According to the areas occupied by the centers, the optic tectum is the first then the cerebello－acoustico－lateral center－octavus nuclei; the vagal lobes and ambiguous nuclei are the third. Although the seventh nuclei do not stick out and form the facial lobe the area held by the seventh nuclei was widely located in the lateral wall of the Ⅳ ventricle. The features of the mandarin fish＇s brain stem are of significance to its predation habit.