posterior commissure 后连合 BAMS:PC BAMS:pc BM:MB-Tec-PC DHBA:10567 DMBA:17787 EMAPA:35695 FMA:62072 HBA:9229 MA:0002743 MBA:158 Rounded band of white fibers crossing the middle line on the dorsal aspect of the upper end of the cerebral aqueduct. It is important in the bilateral pupillary light reflex. Its fibers acquire their medullary sheaths early, but their connections have not been definitely determined. Most of them have their origin in a nucleus, the nucleus of the posterior commissure (nucleus of Darkschewitsch), which lies in the central gray substance of the upper end of the cerebral aqueduct, in front of the nucleus of the oculomotor nerve. Some are probably derived from the posterior part of the thalamus and from the superior colliculus, whereas others are believed to be continued downward into the medial longitudinal fasciculus. The posterior commissure interconnects the pretectal nuclei, mediating the consensual pupillary light reflex[WP]. Diencephalic tract which is located in the vicinity of the dorsal diencephalon and mesencephalon and connects the pretectal nuclei. From Neuroanatomy of the Zebrafish Brain[ZFA]. TAO:0000320 UBERON:0000936 UMLS:C0152327 ZFA:0000320 add connects relationships and check these outside mammalia caudal commissure commissura epithalami commissura epithalamica commissura posterior epithalamic commissure http://braininfo.rprc.washington.edu/centraldirectory.aspx?ID=484 part_of brainstem in MA; midbrain tectum in NIF posterior commissure (Lieutaud) uberon 上丘脑连合(commissura epithalami) 上丘脑连合(commissura epithalamica) 上丘脑连合(epithalamic commissure) 后连合 后连合（Lieutaud） 圆形带状白色纤维穿过大脑导水管上端背侧的中线。这在双侧瞳孔光反射中是重要的。它的纤维很早就获得了髓鞘，但是它们的关系还没有确定。它们大多数起源于核内，即位于动眼神经核的前面，大脑导水管上端的中央灰质物质的后连合核（Darkschewitsch核）。有些可能来自丘脑后部和上丘，而另一些则被认为是继续向下进入内侧纵束。后连合互连的顶盖前核，介导共同的瞳孔光反射[WP]。间脑神经束位于背间脑和中脑附近，并与顶盖前核连接。来自斑马鱼脑神经解剖学[ZFA]。 尾部连合 添加连接关系，并检查这些外部哺乳动物 脑干部分在MA中；中脑顶盖在NIF中。 commissure of diencephalon 间脑连合