Connection lost. Please refresh the page.
Get help How to study Login Register
Ready to learn?
Pick your favorite study tool


Recommended video: Ventricles of the brain [09:39]
Ventricular system of the brain with neighboring structures.

The obex, Latin for barrier, is a small fold on the posterior surface of the medulla oblongata, located at the inferior apex of the fourth ventricle. It is formed by the unison of the left and right taeniae and divides the medulla oblongata into a closed part below containing the central canal and an open part above containing the inferior portion of the fourth ventricle.

The obex extends into the central canal of the brainstem and allows passage of cerebrospinal fluid from the fourth ventricle to the central canal.

Terminology English: Obex
Latin: Obex
Definition Small fold located at the inferior apex of the fourth ventricle which extends into the central canal of the brainstem

Learn more about the ventricles of the brain with this study unit (and article):

Obex: want to learn more about it?

Our engaging videos, interactive quizzes, in-depth articles and HD atlas are here to get you top results faster.

What do you prefer to learn with?

“I would honestly say that Kenhub cut my study time in half.” – Read more.

Kim Bengochea Kim Bengochea, Regis University, Denver
© Unless stated otherwise, all content, including illustrations are exclusive property of Kenhub GmbH, and are protected by German and international copyright laws. All rights reserved.

Register now and grab your free ultimate anatomy study guide!