Origin (Anterior)
Lateral third of the clavicle
Origin (Lateral)
Acromion
Origin (Posterior)
Spine of scapula
Insertion
Deltoid tuberosity of humerus
Actions
- Shoulder flexion
- Shoulder extension
- Shoulder abduction
- Medial & lateral rotation of arm
Innervation
- Axillary nerve (C5, C6)
Blood Supply
- Thoracoacromial branch of the axillary artery
- Posterior circumflex artery
- Deltoid branches of the profunda brachii
Would you like to learn more about the deltoid muscle? Then check out the deltoid muscle article and video by clicking the link below: Deltoid Muscle Anatomy
