foramen magnum in dogs
In anatomy, in the occipital bone, the foramen magnum is one of the several oval or circular apertures in the base of the skull, through which the medulla oblongata (an extension of the spinal cord) enters and exits the skull vault. Apart from the transmission of the medulla oblongata and its membranes, the foramen magnum transmits the Spinal Accessory nerve, vertebral arteries, the anterior and posterior spinal arteries, the membrana tectoria and alar ligaments. [WP,unvetted]. Every claim on this page comes from the Leumas anatomy graph and carries its source.
What the foramen magnum is
In anatomy, in the occipital bone, the foramen magnum is one of the several oval or circular apertures in the base of the skull, through which the medulla oblongata (an extension of the spinal cord) enters and exits the skull vault. Apart from the transmission of the medulla oblongata and its membranes, the foramen magnum transmits the Spinal Accessory nerve, vertebral arteries, the anterior and posterior spinal arteries, the membrana tectoria and alar ligaments. [WP,unvetted]. The atlas records it as a bone at the organ scale in the dog.
Where the foramen magnum is
It sits in the head, within the skeletal 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 foramen magnum connects to
The atlas records 5 typed relationships for it, across 5 kinds of connection. part of skull.
Supply and innervation
This dataset asserts no arterial supply, venous drainage or innervation for the foramen magnum. 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.
Source
Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0003687, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.
- Part of: skull.
- A kind of: bone foramen.
- located in: occipital bone.
- transports: medulla oblongata.
- surrounded by: occipital bone.
Questions
Where is the foramen magnum?
It sits in the head, within the skeletal 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 foramen magnum connect to?
Part of: skull.
Is the foramen magnum 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.