Origin:
•Function:
–control of extrinsic eye muscles and pupil dilation
–Chiefly motor nerves
–Oculomotor = motor to the eye
–Proprioceptive afferents
–Somatic to 4/6 extrinsic eye muscles & upper eye lid
–Parasympathetic: sphincter pupillae (circular muscle of iris)
–Sensory (proprioceptor) afferents
•Clinical testing
–Pupillary reflex
–Convergence for near vision
•Clinical correlation:
–Nerve palsy: external strabismus (eye rotate laterally), ptosis (upper lid droops, double vision & troble w focusing on close object