motor nerves of the eye

brain anatomy cranial motor nerve brainstem human vector diagram nervous system illustration neurology head cortex hypothalamus sensory olfactory cerebellum cerebral cerebrum optic oculomotor trochlear trigeminal abducens facial vestibulocochlear vagus accessory hypoglossal muscle extraocular eyelid lens eye eyeball ocular vision view retina disc iris branch ciliary ganglion parasympathetic pons organ fibres