Floor Of Fourth Ventricle Anatomy

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.

Floor of fourth ventricle anatomy.

Hydrocephalus is classified as noncommunicating and communicating based on whether all ventricular and subarachnoid spaces are communicating. It lies within the brainstem at the junction between the pons and medulla oblongata. It is divisible into a right and left half by the posterior median sulcus and into a superior and inferior triangle by the striae medullares. The ependyma choroid plexus and tela choroidea.

Tumors of the fourth ventricle commonly originate from the following structures composing the floor. The floor of fourth ventricle is divided into two symmetrical halves by the median sulcus. The floor located ventrally is formed by the rhomboid fossa a diamond shaped depression on the dorsal surface of the pons and upper half of the medulla. 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. The superior pontine part of the floor begins at the aqueduct and expands to the lower margin of the cerebellar peduncles. The floor of the fourth ventricle is also referred to as the rhomboid fossa because of its shape. The fourth ventricle is the last in the system it receives csf from the third ventricle via the cerebral aqueduct.

The upper triangular part is formed by the posterior surface of the pons. In the pontine part of floor of fourth ventricle following features are seen. It is widest at the level of the pontomedullary junction. The sidewalls are formed by the veli and cerebellar peduncles.

The roof is composed of the cerebellum located at the back of the brain and the floor is formed by the rhomboid fossa a depression in the brainstem. This ventricle has a roof and a floor. The obex is the most caudal tip of the fourth ventricle. The glistening white floor of the fourth ventricle is the posterior surface of the brain stem fig.

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. From the 4th ventricle the fluid drains into two places. Each half is further subdivided by sulcus limitans into a medial area called medial eminence and lateral vestibular area. Central spinal canal bathes the spinal cord.