start stage end stage brainstem and spinal white matter bulbo-spinal tract tractus bulbospinalis TAO:0000626 zebrafish_anatomy ZFA:0000626 Brainstem and spinal tract which emerges medial to the caudal intermediate reticular formation and runs caudally along the medial edge of the inferior reticular formation. It is displaced laterally and associates with other tracts in the dorsal part of the funiculus lateralis immediately prior to reaching the spinal cord. The bulbo-spinal tract carries descending spinal projections. From Neuroanatomy of the Zebrafish Brain. unknown adult