Floor Of Fourth Ventricle Diagram

The right and left taeniae meet at the inferior angle of the floor to form a small fold called the obex.

Floor of fourth ventricle diagram.

Tumors of the fourth ventricle commonly originate from the following structures composing the floor. Diagram duration. 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 charsi of medical literature 4 317.

Lesions may also arise outside the ventricle and secondarily extend into this chamber including medullary tectal and cerebellar hemispheric masses. For donation contact me on. The ependyma choroid plexus and tela choroidea. The obex is also a.

The fourth ventricle contains cerebrospinal fluid. Fourth ventricle of brain 7 floor. Fourth ventricle of brain 6 floor. The floor of the 4th ventricle is composed by the posterior surface of the pons and the upper part of the medulla.

Diagram the charsi of medical literature. The caudal tip of the fourth ventricle where it becomes the central canal is known as the obex. Specifically it spans from the obex an area in the medulla. If you like my work donate to channel.

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. It has a diamond shape and is located in the upper portion of the medulla. Lateral to it lie the nuclei of the posterior columns. The floor of the fourth ventricle the rhomboid fossa see fig.

It s divisible into 2 parts. 10 3 is formed by the pons and medulla fig. The lowest part of the floor of the fourth ventricle is called the calamus scriptorius because of its resemblance to a nib. 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.

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. The fourth ventricle has an anterior ventral floor with a characteristic diamond shape named the rhomboid fossa and a posterior dorsal tent shaped roof.