Shoulder and Arm Review

Pectoralis Major

• O: Clavicle, sternum, upper ribs

• I: Humerus

• A: Pulls arm anteriorally (across chest), adducts arm

Teres Major

• O: Scapula

• I: Humerus

• A: Adducts arm, rotates arm medial

Teres Minor

• O: Scapula

• I: Humerus

• A: Rotates arm laterally, lift arm backwards

Latissimus Dorsi

• O: Sacral, thoracic, Lumbar, ribs, ilium

• I: humerus

• A: Adduction of the arm, pulls shoulder downward and posterior

Deltoid

• O: Scapula, clavicle

• I: Humerus

• A: Abducts humerus,

Biceps Brachii

• O: Scapula (x2)

• I: Radius, Fascia (radioulnar joint)

• A: Flexes at elbow, rotates hands lateral

Brachialis

• O: Humerus

• I: Ulna

• A: Flexes • forearm • at elbow

Brachioradialis

• O: Humerus

• A: Radius

• I: Flexes • forearm • at elbow

Triceps Brachii

• O: Humerus, scapula, scapula

• I: Ulna

• A: Extends forearm at elbow

Flexors

• Actions:

• Flex the wrist

Extensors

• Action:• Extends Wrist