Movement Analysis

Humeral Flexion

• Pectoralis major

• Long head of biceps

• Anterior deltoid

Humeral Extension

• latissimus dorsi

• teres major

• posterior deltoid

• triceps (long head)

Humeral abduction

• middle deltoid

Humeral adduction

• pectoralis major

• latissimus dorsi

• anterior deltoid

• teres major

• triceps

Humeral internal rotation

• pectoralis major

• latissimus dorsi

• anterior deltoid

• teres major

Humeral external rotation

• posterior deltoid

Humeral horizontal abduction

• pectoralis major

• anterior deltoid

Scapular elevation

• upper fibres of trapezius

Scapular depression

• lower fibers of trapezius

Scapular upward rotation

• upper fibers of trapezius

• lower fibers of trapezius

Scapular retraction

• middle fibers of trapezius

Neck extension and lateral flexion (if scapula is fixed)

• upper fibers of trapezius

Elbow flexion

• biceps brachii

elbow extension

• triceps

Forearm supination

• biceps brachii