Posterior Portion Of Roof Of Third Ventricle

Anterior posterior and two lateral.

Posterior portion of roof of third ventricle.

It is a slit like space lying in the sagittal plane below the fornix and the corpus callosum. The third ventricle is one of four connected fluid filled cavities comprising the ventricular system within the mammalian brain it is a median cleft in the diencephalon between the two thalami and is filled with cerebrospinal fluid csf. In the sagittal plane it has a complex fishlike shape created by two anterior and two posterior recesses and a curving roof and floor most of the lateral walls of the ventricle are formed by the medial aspects of the two. 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 and roof the floor is formed by the optic chiasma the tuber cinereum and the infundibulum the mamillary bodies the posterior perforated substance and the tegmentum of the midbrain. Its posterior portion houses the pineal gland and the habenular nuclei. The third ventricle is a narrow midline cavity that communicates through the foramen of monro with the lateral ventricles and through the aqueduct with the fourth ventricle. Its posterior end is broad and lies in the gap between the splenium above and the posterior part of the roof of the third ventricle below fig.

Ct and mr imaging anatomy of the third ventricle. Lamina terminalis roof. It possesses a roof a floor and four walls. This portion of the brain forms part of the roof of the diencephalon and covers the third ventricle.

The two thalami and superior portion of the hypothalamus. The roof is formed by the thin tela choroidea which is a combination of two membranes the ependyma and pia mater. Describe the location and boundaries of third ventricle. In the axial and coronal planes it has a slitlike contour.

The third ventricle lies in the midline of the diencephalon. The third ventricle is one of the four csf filled cavities draining the lateral ventricle. The obex is also a. The anterior end representing theapex of the triangle lies near the right and left interventricular foramina.

Like other ventricles the third ventricle has a cavity an anterior wall a posterior wall a floor a roof and two lateral walls. The third ventricle has two lateral walls a roof a floor an anterior and a posterior wall. Within the tela choroidea are two plexuses of blood vessels one on either side of the middle line that bulge downwards into the cavity of the third ventricle. The caudal tip of the fourth ventricle where it becomes the central canal is known as the obex.

This gap is called the transverse fissure. It is a cavity within diencephalon it is a midline slit like cavity situated between the two thalami and the part of hypothalamus.