Deltoideus

M. deltoideus

Muscle on the lateral side of the shoulder; flexes the shoulder and abducts the arm.

Draft, not yet reviewed by a veterinarian. Content may contain errors. It is published so the community can review it.

This piece is a schematic shape, not a scan: there is no freely licensed model for this structure yet.

3D model of this piece: Vet Atlas procedural musculature, CC BY-SA 4.0

Overview

It lies on the lateral surface of the scapula and shoulder, caudal to the spine, and covers part of the infraspinatus. In cattle it has two parts:

Scapular part (pars scapularis): arises through an aponeurosis from the spine of the scapula.
Acromial part (pars acromialis): shorter, arising from the acromion.

Spine of the scapula (scapular part) and acromion (acromial part).

Deltoid tuberosity (tuberositas deltoidea) of the humerus.

Flexes the shoulder and abducts the arm.

Axillary nerve (n. axillaris).