Haider S, Singh I J
J Neural Transm. 1979;45(3):239-51. doi: 10.1007/BF01244412.
In Ompok bimaculatus the neurosecretory axons of both the pars magnocellularis and pars parvocellularis component of the nucleus preopticus contribute to the formation of the left and right main tracts. At rostral levels, one third of the tracts are loosely built forming a king of curtain, while they become more compact at caudal levels. The caudal two thirds of the main tracts give off several pairs of lateral tracts which join at the midline to form the paired median tracts. The median and the main tract jointly enter the pituitary as a common tract which, on entering the proximal pars distalis, separates into two and enters the pars intermedia. The hypothalamic and the hypophysial arteries take their origin from the internal carotid artery. The former contribute to the formation of the primary capillary plexus of the median eminence, whereas the latter enter the pituitary directly and ramify in the neuroadeno-interface. The primary capillary plexus is in close topographical contact with the neurosecretory axonal complex where the median and common tracts are formed. At this site at least some axons might have their endings on the capillary plexus. Thus, this region my be comparable in structure to the median eminence of the tetrapods. The neurons of the nucleus lateralis tuberis of O. bimaculatus are AF-positive. The infundibular cavity extends into the main neurohypophysial trunk and is lined by ependymal cells like the third ventricle.
在双斑原鮡中，视前核大细胞部和小细胞部的神经分泌轴突共同参与左右主束的形成。在吻端水平，三分之一的束结构松散，形成一种帘状结构，而在尾端水平它们变得更加紧密。主束的尾端三分之二发出几对侧束，这些侧束在中线处汇合形成成对的正中束。正中束和主束共同作为一条共同束进入垂体，该共同束在进入远侧部近端时分为两支并进入中间部。下丘脑动脉和垂体动脉起源于颈内动脉。前者参与正中隆起初级毛细血管丛的形成，而后者直接进入垂体并在神经腺接口处分支。初级毛细血管丛与形成正中束和共同束的神经分泌轴突复合体在地形上紧密接触。在这个部位，至少一些轴突可能在毛细血管丛上有终末。因此，这个区域在结构上可能与四足动物的正中隆起相当。双斑原鮡外侧结节核的神经元呈抗利尿激素（AF）阳性。漏斗腔延伸至主要的神经垂体干，内衬室管膜细胞，与第三脑室相似。
