start stage end stage spinal nerve dorsal spinal nerve dorsal nerve Ceri zebrafish_anatomy 2013-03-19T04:08:16Z Dorsal branch of the spinal nerve, coursing dorsally and caudally between the muscle and the vertebrae. It remains in the center of the muscle segment and could be followed to the dorsal aspect of the muscle. MiP primary motoneuron axons extend in this branch. ZFA:0005663 unknown adult