start stage end stage cranial nerve cranial nerve V ZFA:0000697 Cranial nerve which exits the medulla oblongata and carries both sensory and motor axons to and from the facial region. The root is typically found at rhombomere 2. CN-V trigeminal nerve zebrafish_anatomy TAO:0000697 ZDB-PUB-040109-20 The motor neuron cell bodies arise in rhombomeres 2 and 3. The neurons in r2 extend axons dorsolaterally to their exit point. The axons of branchiomotor neuron cell bodies in r3 initially extend dorsolaterally, then turn rostrally to reach their exit point in r2. The anterior turn occurs where the motor axons meet the ingrowing trigeminal sensory axons. segmentation:26+ somites adult