Oculomotor nerve palsy

Overview
Damage to the oculomotor nerve, termed oculomotor nerve palsy is known by the down n' out symptoms. The affected eye will be looking downward, because the superior oblique (innervated by CN IV), is unantagonized by the paralyzed superior rectus and inferior oblique and looking outwards, because the lateral rectus (innervated by CN VI) is unantagonized by the paralyzed medial rectus. There will also be strabismus.

They may show a degree of ptosis, or drooping of the eyelid, because the levator palpebrae superioris muscle (eyelid lifting muscle) is also innervated by the oculomotor nerve.