Anterior compartment of the arm

Anterior compartment of the arm

Cross-section through the middle of upper arm.
Artery	brachial artery
Nerve	musculocutaneous nerve

The anterior compartment of the arm is known as the "flexor compartment" as flexion is its main action.

The muscles contained therein are the biceps brachii, brachialis, and coracobrachialis.

They are all supplied by the musculocutaneous nerve, which arises from the fifth, sixth, and seventh cervical spinal nerves (see Brachial plexus).

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v • d • e General anatomy of upper limbs

Arm	Axilla • Axillary sheath • axillary folds (Anterior, Posterior) spaces (Quadrangular space, Triangular space, Triangular interval) • Clavipectoral triangle compartment of arm (Posterior, Anterior) fascia (Axillary, Brachial) - intermuscular septa (Lateral, Medial)

Forearm	Cubital fossa (Bicipital aponeurosis) • Cubital tunnel • common tendons (Extensor, Flexor) • Interosseous membrane of the forearm compartment of forearm (Posterior, Anterior) fascia (Antebrachial fascia)

Hand	posterior: Extensor retinaculum • Extensor expansion • Vincula tendina • Anatomical snuff box anterior: Flexor retinaculum • Carpal tunnel • Palmar aponeurosis • Ulnar canal • Synovial sheath (Common synovial sheath for the flexor tendons) Finger

v • d • e List of muscles of upper limbs

VERTEBRAL COLUMN	trapezius - latissimus dorsi - rhomboid (major, minor) - levator scapulae

THORACIC WALLS	pectoralis major - pectoralis minor - subclavius - serratus anterior

SHOULDER	deltoid - rotator cuff (supraspinatus, infraspinatus, teres minor, subscapularis) - teres major

ARM	anterior compartment: coracobrachialis - biceps brachii - brachialis posterior compartment: triceps brachii - anconeus

FOREARM	anterior compartment: superf. - pronator teres - palmaris longus - flexor carpi radialis - flexor carpi ulnaris - flexor digitorum superficialis anterior compartment: deep - pronator quadratus - flexor digitorum profundus - flexor pollicis longus posterior compartment: superf. - mobile wad (brachioradialis, extensor carpi radialis longus and brevis) - extensor digitorum, - extensor digiti minimi - extensor carpi ulnaris posterior compartment: deep - supinator - anatomical snuff box (abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus) - extensor indicis

HAND	lateral volar - thenar (opponens pollicis, flexor pollicis brevis, abductor pollicis brevis) - adductor pollicis medial volar - hypothenar (opponens digiti minimi, flexor digiti minimi brevis, abductor minimi digiti) - palmaris brevis intermediate - lumbrical - interossei (dorsal, palmar)

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