part_of part of part of hindbrain fourth ventricle xenopus_anatomy Irregularly shaped cavity in the rhombencephalon, between the medulla oblongata, the pons, and the isthmus in front, and the cerebellum behind. It is continuous with the central canal of the cord below and with the cerebral aqueduct above, and through its lateral and median apertures it communicates with the subarachnoid space. XAO:0003099 IVth ventricle UBERON:0002422 4th ventricle brain ventricle