moina scapula and humerus

What is the origin of Deltoid?

Lateral third of clavicle, acromion, spine of scapula

What is the insertion of Deltoid?

Middle of lateral surface of shaft of humerus

What is the innervation/nerve of Deltoid?

Axillary nerve

What actions does the Deltoid do?

Abducts arm; anterior fibers flex and medially rotate arm; posterior fibers extend and laterally rotate arm

What is the origin of Supraspinatus?

Supraspinous fossa of scapula

What is the insertion of Supraspinatus?

Greater tuberosity of humerus; capsule of shoulder joint

What is the innervation/nerve of Supraspinatus?

Suprascapular nerve

What actions does Supraspinatous do?

Initiates shoulder abduction

What is the origin of Infraspinatus?

Infraspinous fossa of scapula

What is the insertion of Infraspinatus?

Greater tuberosity of humerus; capsule of shoulder joint

What is the innervation / nerve of Infraspinatus?

Suprascapular nerve

What actions does the Infraspinatus do?

Laterally rotates arm and stabilizes shoulder joint

What is the origin of Teres major?

Lower third of lateral border of scapula

What is the insertion of Teres major?

Medial lip of bicipital groove of humerus

What is the innervation / nerve of Teres major?

Lower subscapular nerve

What actions does the Teres major do?

Medially rotates and adducts arm and stabilizes shoulder joint

What is the origin of Teres minor?

Upper two thirds of lateral border of scapula

What is the insertion of Teres minor?

Greater tuberosity of humerus; capsule of shoulder joint

What is the innervation / nerve of Teres minor?

Axillary nerve

What actions does the Teres minor do?

Laterally rotates arm and stabilizes shoulder joint

What is the origin of Subscapularis?

Subscapular fossa

What is the insertion of Subscapularis?

Lesser tuberosity of humerus

What is the innervation / nerve of Subscapularis?

Upper and lower subscapular nerves

What actions does the Subscapularis do?

Medially rotates arm and stabilizes shoulder joint