midbrain in dogs

The midbrain is the middle division of the three primary divisions of the developing chordate brain or the corresponding part of the adult brain (in vertebrates, includes a ventral part containing the cerebral peduncles and a dorsal tectum containing the corpora quadrigemina and that surrounds the aqueduct of Sylvius connecting the third and fourth ventricles)[GO]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the midbrain is

The midbrain is the middle division of the three primary divisions of the developing chordate brain or the corresponding part of the adult brain (in vertebrates, includes a ventral part containing the cerebral peduncles and a dorsal tectum containing the corpora quadrigemina and that surrounds the aqueduct of Sylvius connecting the third and fourth ventricles)[GO]. The atlas records it as a nerve at the organ scale in the dog.

Where the midbrain 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 midbrain connects to

The atlas records 43 typed relationships for it, across 6 kinds of connection. part of anatomical entity, brain and nervous system.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the midbrain. 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 MB and mesencephalon. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001891, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: anatomical entity, brain and nervous system.
• A kind of: anatomical structure.
• contains: anterior tegmental nucleus, central gray substance of midbrain, cerebral crus, cerebral peduncle, dorsal raphe nucleus and dorsal tegmental nucleus, and 24 more.
• overlaps: collection of basal ganglia, habenulo-interpeduncular tract, midbrain-hindbrain boundary and pretectal region.
• contributes to morphology of: brain, roof plate of midbrain and substantia nigra.
• Develops from: future brain and neuroectoderm.

Questions

Where is the midbrain?

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 midbrain connect to?

Part of: anatomical entity, brain and nervous system.

Is the midbrain 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.