Brief post on the circulation of cerebral spinal fluid (CSF). Cerebral spinal fluid is produced by arachnoid villi of choroid plexus 75 percent of it is produced in the lateral ventricle of brain from lateral ventricle CSF goes to 3rd ventricle via interventricular foramen also known as foramen of monro then CSF from 3rd ventricle CSF goes to 4th ventricle via aqueduct of sylvius from 4th ventricles CSF goes to venous sinuses via foramen of luschka and magendie.