CRANIAL-NERVE-III, CRANIAL-NERVE-IV, AND CRANIAL-NERVE-VI

Movements of the eye are produced by six extraocular muscles innervate d by three cranial nerves: the oculomotor (III), the trochlear (IV), a nd the abducens (VI). These cranial nerves are discussed together beca use of the interrelated nuclear origins, neural pathways, and motor fu nctions. The normal anatomic pathway of these three nerves is presente d. The clinical and pathologic manifestations of lesions producing bot h isolated and complex palsies of these nerves are discussed along wit h imaging correlation.