As a result of past encephalitis, a man has developed an increase in cerebrospinal fluid pressure in the right lateral ventricle. What can be the cause of this condition?

Answer options

1. Atresia of the tubus medullaris
2. Closure of the right interventricular foramen
3. Closure of the left interventricular foramen
4. Atresia of the sylvian aqueduct
5. Atresia of the fourth ventricle foramina

Explanation

CEREBROSPINAL FLUID CIRCULATE THROUGH THE VENTRICLES ASS FOLLOWS: FROM LATERAL VENTRICLE through interventricular foramen into 3RD VENTRICLE through CEREBRAL AQUEDUCT OF SYLIVUS to reach 4TH VENTYRICLE and out of the FORAMEN LUSCHKA and FORAMEN MAGENDIE TO SUBARACHNOID SPACE where it is absorbed through arachnoid villi into the Dural sinus, where it mixes with the venous blood. THEREFORE, BLOCKAGE OF RIGHT INTRAVENTRICULAR FORAMEM WILL INCREASE PRESSURE IN RIGHT LATERAL VENTRICULAR