All extra-ocular muscles supplied by ipsi- lateral oculomotor complex nuclei except a) Inferior rectus b) Medial rectus c) Superior rectus d) Inferior oblique Answer: Superior rectus Explanation: Extra-ocular Muscle Efferents Three cranial motor nuclei provide efferent control of the extra-ocular muscles. Activation of the motor neurons produces contraction of the innervated muscle. The abducens nucleus sends its axons in the abducens (VI cranial) nerve controls the lateral rectus of the ipsi-lateral eye. The trochlear nucleus sends its axons in the trochlear (IV cranial) nerve controls the superior oblique of the contra-lateral eye. The oculomotor complex contains nuclei that send axons in the oculomotor (III cranial) nerve control the superior levator in the eyelid of both eyes extra-ocular muscles, which include the medial rectus of the ipsi-lateral eye, inferior oblique of the ipsi-lateral eye inferior rectus of the ipsi-lateral eye and superior rectus of the contra-lateral eye.