Rizkalla W
Acta Biol Acad Sci Hung. 1976;27(2-3):163-70.
The hypothalamic neurosecretory system of the marinefish, Mugil auratus, consists of two nuclei, viz., the nucleus praeopticus and the nucleus laterlis tuberis. Both are paired, and while those of the nucleus praeopticus are vertically arranged as L-shaped bodies, their strand-like counterparts in the nucleus lateralis tuberis extend in an antero-posterior direction. The two constituent bodies of the nucleus praeopticus lie on both sides of the third cerebral ventricle. Each is differentiated into a dorsal pars magnocellularis and a ventral pars parvocellularis. A nervous tract, the hypothalamo-hypophysial tract, extends posteriorly from each body, but it is not until after they penetrate the pituitary gland that they fuse into one structure, the neurohypophysis. Many neurosecretory granules accumulate in the neurohypophysis adjacent to the meta-adenohypophysial region, and fewer scattered granules of varying sizes are also present along the hypothalamo-hypophysial tracts. Inner to these hypothalamo-hypophysial tracts extend the two bodies of the nucleus lateralis tuberis along the infundibular region. Axons from this nucleus extend sideways, and as they merge with those adjacently disposed of the hypothalamo-hypophysial tracts, they enter the pituitary gland as a unified structure.
海鱼金线鲃的下丘脑神经分泌系统由两个核组成，即视前核和结节外侧核。两者都是成对的，视前核的核呈L形垂直排列，而结节外侧核的索状对应物则沿前后方向延伸。视前核的两个组成部分位于第三脑室两侧。每个部分又分为背侧大细胞部和腹侧小细胞部。一条神经束，即下丘脑 - 垂体束，从每个部分向后延伸，但直到它们穿透垂体后才融合成一个结构，即神经垂体。许多神经分泌颗粒积聚在与腺垂体中叶区域相邻的神经垂体中，并且在下丘脑 - 垂体束中也存在较少的大小不一的散在颗粒。在这些下丘脑 - 垂体束内部，结节外侧核的两个部分沿着漏斗区延伸。来自该核的轴突向侧面延伸，当它们与相邻的下丘脑 - 垂体束的轴突合并时，作为一个统一的结构进入垂体。
