| Origin |
Lateral third of clavicle, acromion, and spine of scapula
|
| Insertion |
Deltoid tuberosity of humerus
|
| Action |
Anterior part: flexes and medially rotates arm
Middle part: abducts arm
Posterior part: extends and laterally rotates arm
|
| Innervation |
Axillary nerve (C5 and C6)
|
Arterial
Supply |
Deltoid branch of thoracoacromial artery
|
