Skip to Content
Medical Term:

common tendinous ring of extraocular muscles


Definition: a fibrous anulus that surrounds the optic canal and the medial part of the superior orbital fissure; it gives origin to the four rectus muscles of the eye and is partially fused with the sheath of the optic nerve.

Synonym(s): anulus tendineus communisTA, anulus of Zinn, Zinn ligament, Zinn ring, Zinn tendon

© Copyright 2016 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.