Floor Of Third Ventricle Radiology

These include the cerebellum covering about the middle third of the ventricle and the superior cerebellar peduncles and anterior medullary velum covering the rostral third of the ventricle.

Floor of third ventricle radiology. Although usually asymptomatic they can rarely present with acute and profound hydrocephalus. The floor of the fourth ventricle the rhomboid fossa see fig. 10 3 is formed by the pons and medulla fig. In the axial and coronal planes it has a slitlike contour.

Its anterior wall is formed by the lamina terminalis columns of the fornix and the anterior commissure. 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. Colloid cysts of the third ventricle are benign tumors that comprise approximately 1 of primary brain neoplasms. Most of the lateral walls of the ventricle are formed by the medial aspects of the two thalami which communicate in the midline along a band of gray matter known as the massa intermedia.

The necessity of their treatment is widely admitted. Like other ventricles the third ventricle has a cavity an anterior wall a posterior wall a floor a roof and two lateral walls. In the patients with aqueductal stenosis or obstruction intraaqueductal csf flow is reduced or fully absent so endoscopic fenestration of the third ventricle floor provides an alternative quasi physiological csf flow pathway to the subarachnoid spaces through the interpeduncular cistern and downwards resulting in dispersed and minimized pressure gradient on midline brain structures surrounding cerebral aqueduct. Do not forget to click on bell icon and never miss the new video.

If you like the video than like it subscribe it and share with your friends. In the sagittal plane it has a complex fishlike shape created by two anterior and two posterior recesses and a curving roof and floor. The third ventricle lies in the midline of the diencephalon. Ct and mr imaging anatomy of the third ventricle.

The mammillary bodies and midbrain posterior to the tuber cinereum form the poste rior aspect of the floor of the third ventricle and do not normally enhance on mr images. The fourth ventricle is one of the four connected fluid filled cavities within the human brain these cavities known collectively as the ventricular system consist of the left and right lateral ventricles the third ventricle and the fourth ventricle the fourth ventricle extends from the cerebral aqueduct aqueduct of sylvius to the obex and is filled with cerebrospinal fluid csf. These portions of the hypothalamus lack a blood brain barrier and typically enhance with gadolinium on mr images. Colloid cysts of the third ventricle are benign epithelial lined cysts with characteristic imaging features.

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