sternocleidomastoid in dogs

A paired muscle in the superficial layers of the anterior portion of the neck. It acts to flex and rotate the head. It also acts as an accessory muscle of inspiration, along with the scalene muscles of the neck. [WP,unvetted]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the sternocleidomastoid is

A paired muscle in the superficial layers of the anterior portion of the neck. It acts to flex and rotate the head. It also acts as an accessory muscle of inspiration, along with the scalene muscles of the neck. [WP,unvetted]. The atlas records it as a muscle at the organ scale in the dog.

Where the sternocleidomastoid is

It sits in the neck, within the muscular system. Only the region is known. The position shown is somewhere plausible inside it and nothing more.

What the sternocleidomastoid connects to

The atlas records 6 typed relationships for it, across 3 kinds of connection. a kind of anatomical structure, cleidocephalicus muscle and muscle of neck.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the sternocleidomastoid. 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 SCM, sterno-mastoid, sternocleidomastoid muscle, sternomastoid, sternomastoid muscle and musculus sternocleidomastoideus, and 8 more. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001128, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• A kind of: anatomical structure, cleidocephalicus muscle and muscle of neck.
• originates from: clavicle bone and manubrium of sternum.
• inserts into: mastoid process of temporal bone.

Questions

Where is the sternocleidomastoid?

It sits in the neck, within the muscular system. Only the region is known. The position shown is somewhere plausible inside it and nothing more.

What does the sternocleidomastoid connect to?

A kind of: anatomical structure, cleidocephalicus muscle and muscle of neck.

Is the sternocleidomastoid 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.