fourth ventricle in dogs

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 dog.

Where the fourth ventricle is

It sits within the nervous system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What the fourth ventricle connects to

The atlas records 12 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 choroid plexus stroma and fourth ventricle ependyma, and 1 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. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What does the fourth ventricle connect to?

Part of: hindbrain.

Is the fourth ventricle the same in other species?

This page describes the dog. The human record of the same structure sits beside it on /compare, over one shared model rather than two atlases built separately.