U.S. doctors online nowAsk doctors free
A 36-year-old member asked:

What controls eye movements and the size of the pupils?

1 doctor answer1 doctor weighed in
Dr. Daniel Schainholz
Ophthalmology 35 years experience
Cranial Nerves: Cranial N II (Optic) subtends vision, III (oculomotor) subtends levator, superior rectus (sup. branch), medial rectus, inferior rectus, inf. oblique & pupillary constriction (inf. branch); IV (trochlear) subtends superior oblique; VI (abducens) subtends lateral rectus; and sympathetics along the arterial pathway subtend pupillary dilation. CN's on the left and right. Nuclei in the brainstem.
Last updated Jun 26, 2017
Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
24/7 visits - just $39!
50% off with $15/month membership

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.