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UE Muscles
Muscles of the Shoulder, Elbow, Wrist & Hand
Muscle | Actions | Nerve Supply | Spinal Segment |
---|---|---|---|
Brachialis | Elbow flexion | Musculocutaneous | C5, C6, C7 |
Brachioradialis | Elbow flexion | Radial | C5, C6, C7 |
Coracobrachialis | Shoulder flexion | Musculocutaneous | C5, C6, C7 (lateral cord) |
Deltoid | Abduction | Axillary | C5, C6 (posterior cord) |
Deltoid (anterior fibers) | Shoulder flexion/horizontal adduction/internal rotation | Axillary | C5, C6 (posterior cord) |
Deltoid (posterior fibers) | Extension/horizontal abduction/external rotation | Axiallry | C5, C6 (posterior cord) |
Flexor Carpi Radialis | Pronation/wrist flexion/radial deviation | Median | C6, C7 |
Flexor Carpi Ulnaris | Elbow flexion/wrist flexion & ulnar deviation | Ulnar | C7, C8 |
Infraspinatus | Horizontal abduction/abduction/external rotation | Suprascapular | C5, C6 |
Latissimus Dorsi | Shoulder extension/adduction/internal rotation & Scapular depression/protraction | Thoracodorsal | C6, C7, C8 (posterior cord) |
Levator Scapulae | Elevation of scapula/scapular downward rotation | Dorsal Scapular | C3, C4 |
Pectoralis Major | Shoulder horizontal adduction/adduction/internal rotation & Scapular depression/protraction | Lateral pectoral | C5, C6 (lateral cord) |
Pectoralis Major (Clavicular fibers) | Forward flexion | Lateral pectoral | C5, C6 (lateral cord) |
Pectoralis Major (Sternocostal fibers) | Extension | Lateral pectoral & Medial pectoral | C5, C6 (lateral cord), C8, T1 (medial cord) |
Pectoralis Minor | Scapular depression/protraction/downward rotation | Medial pectoral | C8, T1 (medial cord) |
Pronator Quadratus | Pronation | Median (Anterior interossei) | C8, T1 |
Pronator Teres | Elbow flexion/pronation | Median | C6, C7 |
Rhomboid Major | Elevation, retraction and downward rotation of scapula | Dorsal Scapular | C4, C5 |
Rhomboid Minor | Elevation, retraction, and downward rotation of the scapula | Dorsal Scapular | C4, C5 |
Serratus Anterior | Depression, upward rotation, protraction of the scapula | Long Thoracic | C5, C6, C7 |
Subscapularis | Abduction/adduction & internal rotation when are is at the side | Subscapular | C5, C6 (posterior cord) |
Supinator | Supination | Radial | C5, C6 |
Supraspinatus | Abduction | Suprascapular | C5, C6 |
Teres Major | Extension/horizontal abduction/adduction/internal rotation | Subscapular | C5, C6 (posterior cord) |
Teres Minor | Extension/horizontal abduction/adduction/external rotation | Axillary | C5, C6 (posterior cord) |
Trapezius | Retraction/elevation/depression/upward rotation of the scapula | Accessory | Cranial Nerve XI, C3, C4 |
Triceps | Elbow extension | Radial | C6, C7, C8 |
Triceps (long head) | Extension | Radial | C5, C6, C7, C8, T1 (posterior cord) |
Extensor Carpi Radialis Longus | Wrist extension/radial deviation | Radial | C6, C7 |
Extensor Carpi Radialis Brevis | Wrist extension | Radial (Posterior interosseus) | C7, C8 |
Extensor Carpi Ulnaris | Wrist extension/ulnar deviation | Radial (Posterior interosseus) | C7, C8 |
Abductor Pollicis Longus | Wrist radial deviation/thumb radial abduction | Radial (Posterior interosseus) | C7, C8 |
Extensor Pollicis Longus | Thumb extension/retroposition | Radial (Posterior interosseus) | C7, C8 |
Extensor Pollicis Brevis | Wrist radial deviation/thumb radial abduction/extension/retropulsion | Radial (Posterior interosseus) | C7, C8 |
Extensor Digitorum | Finger extension | Radial (Posterior interosseus) | C7, C8 |
Extensor Indicis | Index finger extension | Radial (Posterior interosseus) | C7, C8 |
Extensor Digiti Minimi | Fifth finger extension | Radial (Posterior interosseus) | C7, C8 |
Flexor Digitorum Profundus | Finger flexion | Median (Anterior interosseus) | C8, T1 |
Flexor Digitorum Superficialis | Finger flexion | Median | C8, T1 |
Lumbricals | Finger flexion | 1st & 2nd Median, 3rd & 4th Ulnar | C8, T1 |
Dorsal Interossei | Finger flexion/abduction | Ulnar | C8, T1 |
Flexor Digiti Minimi | Fifth finger flexion | Ulnar | C8, T1 |
Palmar Interossei | Finger flexion/adduction | Ulnar | C8, T1 |
Abductor Digiti Minimi | Fifth finger abduction | Ulnar | C8, T1 |
Abductor Pollicis Brevis | Thumb palmar abduction/opposition | Median | C8, T1 |
Flexor Pollicis Brevis | Thumb flexion/opposition | Median (superficial head) & Ulnar (deep head) | C8, T1 |
Flexor Pollicis Longus | Thumb flexion | Median (Anterior Interosseus) | C8, T1 |
Opponens Pollicis | Thumb flexion/opposition | Median | C8, T1 |
Adductor Pollicis | Thumb palmar & radial deviation | Ulnar | C8, T1 |
Opponens Digiti Minimi | Fifth finger opposition | Ulnar | C8, T1 |
Anconeous | Elbow extension | Radial | C7, C8, T1 |
Biceps Brachii | Elbow flexion/supination, shoulder flexion | Musculocutaneous | C5, C6, C7 (lateral cord) |