The Choroid Plexus Of The Fourth Ventriclein Posterior View

Description

Framed from a posterior approach, the animation follows the choroid plexus of the fourth ventricle as a T-shaped, frond-like vascular tissue draped along the inferior medullary velum and tela choroidea, bridging the midline and extending laterally into the paired lateral recesses. The rhomboid fossa forms the anterior floor of the ventricle, backed by the dorsal pons superiorly and the open medulla inferiorly, while the cerebellar vermis and inferior cerebellar peduncles lie posterior and lateral. As the sequence progresses, the plexus is tracked from its midline attachment toward each recess, clarifying how it approaches the foramina of Luschka at the cerebellopontine angle. Orientation stays strictly posterior. Landmarks remain constant. That lateral reach matters clinically because choroid plexus at the fourth ventricle and its foraminal extensions becomes a key anatomic reference in obstructive hydrocephalus, where outflow from the ventricular system can be impeded at the outlets of the fourth ventricle. The motion makes the spatial problem legible: you watch the plexus sweep toward the lateral apertures and appreciate how close it sits to structures encountered in posterior fossa surgery, including the dorsal brainstem and inferior cerebellar peduncles. This is also a practical way to teach where cerebrospinal fluid is produced and how it exits the ventricular system into the subarachnoid space. Use this clip in neuroanatomy and neurophysiology modules on ventricular anatomy and CSF circulation, in neuroradiology teaching files when correlating posterior fossa MRI sections with ventricular landmarks, or in operative education discussing approaches near the fourth ventricle and cerebellopontine angle. Anatomical accuracy verified by SciePro's Medical Advisory Board.