Floor Of Fourth Ventricle Diagram

Specifically it spans from the obex an area in the medulla.

Floor of fourth ventricle diagram.

Diagram duration. It s divisible into 2 parts. The floor of the 4th ventricle is composed by the posterior surface of the pons and the upper part of the medulla. Lesions may also arise outside the ventricle and secondarily extend into this chamber including medullary tectal and cerebellar hemispheric masses.

Fourth ventricle of brain 6 floor. The floor of the fourth ventricle the rhomboid fossa see fig. The fourth ventricle contains cerebrospinal fluid. The obex is also a.

It has a diamond shape and is located in the upper portion of the medulla. Fourth ventricle of brain 7 floor. 4 shows the floor of the fourth ventricle bounded on each side by the insertion of the tela choroidea inferior the torn edge of which shows in the sections situated at a point corresponding to the descending root of the vestibularis. The fourth ventricle has a roof at its upper posterior surface and a floor at its lower anterior surface and side walls formed by the cerebellar peduncles nerve bundles joining the structure on the posterior side of the ventricle to the structures on the anterior side.

Csf produced and or flowing into the fourth ventricle can exit to the subarachnoid space through lateral apertures and a single median aperture located in the inferiorportion of the roof. Each inferolateral margin of the ventricle is marked by a narrow white ridge or taenia. For donation contact me on. The lowest part of the floor of the fourth ventricle is called the calamus scriptorius because of its resemblance to a nib.

The right and left taeniae meet at the inferior angle of the floor to form a small fold called the obex. If you like my work donate to channel. 10 3 is formed by the pons and medulla fig. The charsi of medical literature 4 317.

Tumors of the fourth ventricle commonly originate from the following structures composing the floor. The ependyma choroid plexus and tela choroidea. The caudal tip of the fourth ventricle where it becomes the central canal is known as the obex. Lateral to it lie the nuclei of the posterior columns.

Its rhomboid in shape diamond shaped and as a result of its shape the floor of the 4th ventricle is usually referred to as rhomboid fossa. Tcml charsi neuro anatomy ventricle brain like comment share subscribe for any query tell me in comment section.