Floor Of Fourth Ventricle Dissection

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.

Floor of fourth ventricle dissection.

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. The third ventricle is situated in between the right and the left thalamus. Paul rea in essential clinical anatomy of the nervous system 2015. The caudal tip of the fourth ventricle where it becomes the central canal is known as the obex.

The floor of fourth ventricle is also known as rhomboid fossa whi. Superiorly it narrows to become continuous with the aqueduct of the midbrain. Specifically it spans from the obex an area in the medulla. The fourth ventricle is found in the posterior region of the pons and medulla and is rhomboid in shape.

Csf enters the ventricle via the cerebral aqueduct and leaves via one of four routes. Inferiorly it narrows and leads into the central canal of the medulla. It has a diamond shape and is located in the upper portion of the medulla. 3 the fourth ventricle is situated dorsal to the pons and upper part of medulla oblongata and ventral to the cerebellum.

4 1 lateral walls of fourth ventricle. Features of the floor of the fourth ventricle rhomboid fossa the floor of the 4th ventricle displays the following features. The fourth ventricle is one of the components of the ventricular system in the brain along with the lateral and third ventricles it extends from the cerebral aqueduct of sylvius rostrally to the obex caudally and is filled with csf. Infundibular recess located above the optic stalk.

If you like the video than like it subscribe it and share with your friends. Do not forget to click on bell icon and never miss the new video. If you do not. The anterior surface of the ventricle contains two protrusions.

The video demonstrates the external features of pons and the floor of the fourth ventricle. The obex is also a. The whole floor is split into left and right symmetrical halves by a median sulcus which stretches from the aperture of the aqueduct of the midbrain above to the commencement of the central canal below. The fourth ventricle has an anterior ventral floor with a characteristic diamond shape named the rhomboid fossa and a posterior dorsal tent shaped roof.

The fourth ventricle contains cerebrospinal fluid. 4 2 floor or ventral wall of fourth ventricle 4 3 roof of the fourth ventricle. The lateral ventricles are connected to the third ventricle by the foramen of monro.