Choroid Plexus Of The Fourth Ventricle, Posterior View

Description

Choroid plexus of the fourth ventricle occupies the caudal roof of the rhomboid fossa in this posterior perspective, forming a T-shaped, frond-like vascular structure suspended from the tela choroidea. The midline portion lies just superior to the obex and inferior to the inferior medullary velum, while paired lateral limbs project laterally into the lateral recesses toward the foramina of Luschka. Medially the plexus relates to the dorsal surface of the medulla, and superiorly it approaches the cerebellar vermis and nodulus across the ventricular cavity. Orientation is unambiguous. CSF production and egress through the fourth ventricular apertures hinge on this anatomy, so the lateral extensions shown here matter when teaching obstructive hydrocephalus patterns at the level of the foramina of Luschka or Magendie. Neurosurgical entry to the fourth ventricle through a midline suboccipital approach often uses the inferior medullary velum and tela choroidea as a corridor, and the choroid plexus can be a tactile and visual landmark that helps keep dissection planes within the ventricular roof rather than the dorsal medulla. The lighting and surface detail help distinguish the vascular fronds of the plexus from the smoother ependymal margins of the ventricle, a practical distinction when correlating with post-contrast MRI where choroid plexus enhancement can mimic intraventricular pathology. Ideal applications include neuroanatomy and neurophysiology lectures on the ventricular system, medical publishing figures on hindbrain CSF pathways, and neurosurgery teaching files addressing fourth ventricular tumors (for example, choroid plexus papilloma) and postoperative anatomy after telovelar exposure. It also supports radiology education on normal choroid plexus location in the posterior fossa and common pitfalls in interpreting enhancement near the lateral recesses. Anatomical accuracy verified by SciePro's Medical Advisory Board.