Upper Extremity Actions

Subscapularis

adduction/ medial rotation

Teres Minor

lateral rotation, adduction

Teres Major

adduction, medial rotation

Infraspinatus

lateral rotation

Supraspinatus

initiates abduction

Clavicular head of pectoralis major

adducts/internally rotates humerus, flexion of humerus from extended position

Sternocostal head of pectoralis major

adducts/internally rotates humerus, extension of humerys from flexed position

Pectoralis Minor

scapular depression and protraction, scapular downward rotation

latissimus dorsi

adduction, extension, IR of arm at shoulder, assist in trunk flexion/extension, lateral trunk flexion and pelvic tilt

rhomboids minor and major

retraction, elevation of scapula

Upper Trapezius

Elevate scapula, upward rotation

Middle Trapezius

retraction

Lower Trapezius

depression, upward rotation

Anterior Deltoid

flex, medially rotate humerus

Middle deltoid

abduction

Posterior deltoid

extend, laterally rotate humerus

Medial and Lateral Triceps brachii

elbow extension

Long head triceps brachii

elbow extension, glenohumeral extension and stabilization

Long head biceps brachii

elbow flexion, supination, shoulder flexion

Short head biceps brachii

elbow flexion, supination, shoulder flexion

Serratus Anterior

upward rotation, downward, rotation, protraction, depression of scapula

Coracobrachialis

flexion, adduction, medial flexion

brachialis

elbow flexion

brachioradialis

elbow flexion, stabilization of elbow