Oculomotor Nerves (III)

"Oculomotor nerves" arise from the midbrain and pass into the orbits of the eyes. One part of each nerve connects several voluntary muscles: the "levator palpebrae superioris" muscles, which raise the eyelids, and most of the muscles attached to eye surfaces that cause them to move - the "superior rectus", "medial rectus", and "inferior oblique" muscles. The second part of the nerve supplies involuntary muscles inside the eyes. These act to adjust the amount of light that enters the eyes and aid in focusing the lenses of the eyes. They are number "III" in the cranial nerve order from the front of the brain. They also contain some sensory nerve fibers to transmit information about the condition of certain eye muscles.