nucleus of oculomotor n. nucleus of trochlear n. medial longitudinal fasciculus nucleus of abducens n. vestibular nuclei vestibulocerebellum vestibular medial vestibulospinal tract ganglion lateral vestibulospinal tract anterior motor neuron of the cervical portion of to anterior horn of spinal cord the sacral portion of spinal cord Function:regulation of eyeball movements and maintenance of body equilibrium. Function: regulation of eyeball movements and maintenance of body equilibrium