part of start stage end stage superior raphe nucleus dorsal raphe nucleus zebrafish_anatomy May be homologous to the dorsal raphe nucleus of human mouse and rat. ZDB-PUB-081008-18. anterior raphe nucleus ZFA:0000440 Hindbrain nucleus that is located in ventral rhombomeres 1-3 and gives rise to ascending fibers innervating most areas of the brain. Early in development, both the superior raphe nucleus emits rostrally and caudally directed projections. However, in the adult, the long projections of superior raphe nucleus restricted to anterior. TAO:0000440 raphe nucleus hindbrain nucleus unknown adult