11. When cranial nerves are affected, neuropathies of the oculomotor nerve ( cranial nerve # 3 ) are most common. 12. Specific nerves include several cranial nerves, specifically the oculomotor nerve , facial nerve, glossopharyngeal nerve, and vagus nerve. 13. This can cause palsy of the facial nerve or oculomotor nerve or hearing loss due to damage of cranial nerve VIII. 14. The condition can also result from aplasia or hypoplasia of one or more of the muscles supplied by the oculomotor nerve . 15. The oculomotor nerve comes out between the peduncles, and the trochlear nerve is visible wrapping around the outside of the peduncles. 16. A complete oculomotor nerve palsy will result in a characteristic " down and out " position in the affected eye. 17. This is called herniation and will often cause an enlarged pupil on the affected side, due to pressure on the oculomotor nerve . 18. The oculomotor neurons functions to send its axons in the oculomotor nerve , to control the medial rectus, and converge the two eyes. 19. It is important to distinguish the ptosis caused by Horner's syndrome from the ptosis caused by a lesion to the oculomotor nerve . 20. More rarely, the oculomotor nerve and trochlear nerve ( weakness of the muscles of facial expression on one or both sides of the face.
