scalenus medius in dogs

The Scalenus medius, the largest and longest of the three scalene muscles, arises from the posterior tubercles of the transverse processes of the lower six cervical vertebræ. It descendes along the side of the vertebral column to insert by a broad attachment into the upper surface of the first rib, between the tubercle and the subclavian groove. The brachial plexus and the subclavian artery pass anterior to it. Because it elevates the upper ribs, the middle scalene muscle is also one of the accessory muscles of respiration. [WP,unvetted]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the scalenus medius is

The Scalenus medius, the largest and longest of the three scalene muscles, arises from the posterior tubercles of the transverse processes of the lower six cervical vertebræ. It descendes along the side of the vertebral column to insert by a broad attachment into the upper surface of the first rib, between the tubercle and the subclavian groove. The brachial plexus and the subclavian artery pass anterior to it. Because it elevates the upper ribs, the middle scalene muscle is also one of the accessory muscles of respiration. [WP,unvetted]. The atlas records it as a muscle at the organ scale in the dog.

Where the scalenus medius 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 scalenus medius connects to

The atlas records 5 typed relationships for it, across 4 kinds of connection. a kind of muscle of neck and skeletal muscle organ, vertebrate.

Supply and innervation

Innervation: nerve of cervical vertebra.

Also called

Also recorded as medial scalene muscle, middle scalene, musculus scalenus medius and scalenus medius muscle. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001122, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• A kind of: muscle of neck and skeletal muscle organ, vertebrate.
• Innervated by: nerve of cervical vertebra.
• inserts into: rib 1.
• originates from: cervical vertebra.

Questions

Where is the scalenus medius?

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 scalenus medius connect to?

A kind of: muscle of neck and skeletal muscle organ, vertebrate.

Is the scalenus medius 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.