The Fourth Ventricle
Boundaries:
  • Roof: Cerebellum, superior medullary velum.
     Lateral wall: cerebellar peduncles.
  • Floor:
    Caudal dorsal pons
    Rostral dorsal medulla which contains the
  1. Facial colliculi
  2. Vestibular triangle
  3. Stria medulare,
  4. Hypoglossal trigone
  5. vagal trigone.