Before revision: pulley-like nerve) also known as the fourth cranial nerve, cranial nerve IV, or CN IV, is a cranial nerve that innervates just one muscle : the superior oblique muscle of the eye , which operates through the pulley-like trochlea .
After revision: pulley-like nerve) also known as the fourth cranial nerve, cranial nerve IV, or CN IV, is a cranial nerve that innervates a single muscle - the superior oblique muscle of the eye ( which operates through the pulley-like trochlea .