fourth ventricle
Part of the ventricular system of the brain, forming a single large irregularly shaped cavity located on the midline of the rhombencephalon, between the medulla, pons and the isthmus ventrally and the cerebellum dorsally. It is continuous with the cerebral aqueduct anteriorally and the central canal of the spinal cord posteriorly. It communicates with the subarachnoid space through its lateral and median apertures. Every claim on this page comes from the Leumas anatomy graph and carries its source.
What the fourth ventricle is
Part of the ventricular system of the brain, forming a single large irregularly shaped cavity located on the midline of the rhombencephalon, between the medulla, pons and the isthmus ventrally and the cerebellum dorsally. It is continuous with the cerebral aqueduct anteriorally and the central canal of the spinal cord posteriorly. It communicates with the subarachnoid space through its lateral and median apertures. The atlas records it as a tissue at the tissue scale in the human body.
Where the fourth ventricle is
It sits within the nervous system. Positioned deliberately as part of this species body plan.
What the fourth ventricle connects to
The atlas records 15 typed relationships for it, across 4 kinds of connection. part of hindbrain.
Supply and innervation
This dataset asserts no arterial supply, venous drainage or innervation for the fourth ventricle. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.
Also called
Also recorded as ventricle IV, rhombencephalic vesicle, 4th ventricle, IVth ventricle, fourth ventricle proper and hindbrain ventricle, and 4 more. Searching any of those names reaches this page.
Source
Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002422, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.
- Part of: hindbrain.
- A kind of: brain ventricle.
- contains: area postrema, choroid plexus of fourth ventricle, fourth ventricle aperture, fourth ventricle choroid plexus epithelium, fourth ventricle ependyma and lateral eminence of fourth ventricle, and 4 more.
- contributes to morphology of: hindbrain, fourth ventricle lateral aperture and fourth ventricle median aperture.
Questions
Where is the fourth ventricle?
It sits within the nervous system. Positioned deliberately as part of this species body plan.
What does the fourth ventricle connect to?
Part of: hindbrain.
Is the fourth ventricle the same in other species?
Leumas holds the same relationship vocabulary for every species it carries, so where another dataset records this structure you can put the two side by side on /compare.