start stage end stage diencephalic nucleus nucleus of the caudal commissure nucleus of posterior commissure nucleus of the tract of the posterior commissure Ceri nuc PC zebrafish_anatomy nTPC ZFA:0005850 2015-06-19T03:27:22Z A cluster of neurons first visible in the embryonic diencephalon located in the dorsolateral brain just posterior to the posterior commissure, that project growth cones ventrally along the posterior commissure to the anterior tegmentum where the PC intersects two longitudinal tracts, the tract of the postoptic commissure (TPOC) and the medial longitudinal fasciculus (MLF). Once at the intersection, nuc PC growth cones turn posteriorly onto the TPOC in the dorsal tegmentum and follow it to the hindbrain. unknown adult