Floor Fourth Ventricle Of Brain

Resection of a fourth ventricular ependymoma adherent to the floor of the ventricle fourth ventricular tumors pose a surgical challenge albeit less than their third ventricular counterparts because of their relation to the brainstem.

Floor fourth ventricle of brain.

It is located within the pons or in the upper part of the medulla oblongata. It lies within the brainstem at the junction between the pons and medulla oblongata. The floor of fourth ventricle is diamond shaped and is also known as rhomboid fossa. Much like other portions of the ventricular system inside the brain the fourth ventricle develops from the area inside the neural tube the structure in an embryo that becomes the brain and spinal.

The fourth ventricle is the last in the system it receives csf from the third ventricle via the cerebral aqueduct. 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 outlet obstruction fvoo is a rare but well established cause of obstructive tetra ventricular hydrocephalus characterizing with dilatation or large cerebrospinal fluid collection of the foramen of magendie and foramen of luschka. The only naturally occurring openings between the ventricles of the brain and the subarachnoid space surrounding the brain are the foramina of luschka and magendie in the fourth ventricle.

Csf enters the ventricle via the cerebral aqueduct and leaves via one of four routes. The fourth ventricle has a characteristic diamond shape in cross sections of the human brain. It is formed by the dorsal surface of pons and upper open part of the medulla. The fourth ventricle has an anterior ventral floor with a characteristic diamond shape named the rhomboid fossa and a posterior dorsal tent shaped roof.

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. From the 4th ventricle the fluid drains into two places. View chapter purchase book.

10 3 is formed by the pons and medulla fig. The floor of the fourth ventricle the rhomboid fossa see fig. Central spinal canal bathes the spinal cord. 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.

Hydrocephalus is classified as noncommunicating and communicating based on whether all ventricular and subarachnoid spaces are communicating. It extends from the cerebral aqueduct of sylvius rostrally to the obex caudally and is filled with csf.