<prompt> All of the following ocular muscles are supplied by CN III EXCEPT:Superior rectusSuperior obliqueInferior rectusMedial rectus  <response>: Ans. b Superior obliqueRef: A.K. Khurana 6th ed. 5-6, 337EXTRA-OCULAR MUSCLES The extraocular muscles control the movement of the eye. Levator Palpabrae Superioris LPS: muscle which elevates the palpabrae upwards resulting in opening the eye. When LPS gets tired, mullers muscle and frontalis muscle helps in elevation of eyelid. Eyeball muscles 6: 4 Recti muscles: superior SR, inferior IR, lateral LR and medial rectus MR 2 Oblique muscles: superior oblique and inferior oblique The muscles supplied by the occulomotor nerve CN III are: superior, inferior and medial rectus and inferior oblique, sphincter papillae and ciliary muscle. Lateral rectus is supplied by abducens VI Trochlear nerve CN IV supplies superior oblique muscle. Mnemonic: LR6, S04, 03; which means lateral rectus is supplied by sixth nerve, superior oblique by fourth nerve and all other by EOM by third cranial nerve. 