Anatomy-Branches of Internal Carotid

Question 1

Ophthalmic

Answer 1

At emergence from cavernous sinus, goes through optic canal, gives off central artery of retina (end-artery; only blood supply to retina)

Question 2

Posterior communicating a.

Answer 2

Joins PCA; 2nd most common site of aneurysm

Question 3

Anterior cerebral a.

Answer 3

Terminal branch of ICA; supplies medial and superolateral hemispheres, joined to opposite ACA by Acomm

Question 4

Middle Cerebral a.

Answer 4

Largest terminal branch, runs in lateral sulcus, supplies lateral hemisphere except a narrow strip along superolateral margin (ACA) and occipital and inferolateral (PCA); supplies all motor except leg