Corrugation of skin Ulner nerve "superficial branch" Palmaris brevis

Abduction Ulnar nerve "deep branch" Abductor digiti minimi

Flexion Ulnar nerve "deep branch" Flexor digiti minimi Hypothenar Eminence (3) Pulls the 5th Ulnar nerve "deep branch" Opponens digiti minimi metacarpal forward

Abduction Median nerve Abductor pollicis

Flexion Median nerve Flexor pollicis Thenar Eminence (3) Adduction of the arm Opposition Median nerve Opponens pollicis Hand Adduction Ulnar nerve "deep branch" Adductor pollicis Pectoralis Major Medial & Lateral pectoral nerve Medial Rotation of the arm

Flex metacarpophalangeal joints Clavicular head helps in flexion of the arm Median nerve 1st & 2nd Extends interphalangeal joints Depression of the shoulder Lumbrical (4) Pectoralis Minor Medial pectoral nerve Pectoral region Draw the ribs upward & outward Flex metacarpophalangeal joints Ulnar nerve 3rd & 4th "deep branch" Fixes the clavicle during Extends interphalangeal joints Subclavius Nerve to subclavius from upper trunk movement of shoulder joint Adduction of fingers Ulnar nerve Palmar interossei (4) Draws the scapula forward in boxing Abduction of fingers Ulnar nerve Dorsal interossei (4) Serratus anterior Long thoracic nerve Rotates scapula outwards in Strong supination raising the arm above 90 degree

Strong flexion of elbow Musculocutaneous Biceps brachii Extension

Weak flexion of shoulder Anterior Vertebral Column to humerus Latissimus dorsi Thoracodorsal nerve Adduction Arm Flexion & weak adduction of arm Musculocutaneous Coracobrachialis Medial rotation of humerus

Strong flexion of forearm Musculocutaneous & radial nerve Brachialis Upper fibers: elevate scapula

Strong extension of elbow Radial nerve Triceps Posterior Superficial Trapezius Accessory Nerve Middle fibers: retract scapula

Pronation & flexion of forearm Median nerve Pronator teres Muscles of the back Lower fibers: depress scapula Vertebral Column to scapula Flexion & abduction of hand Median nerve Flexor carpi radialis Levator Scapulae Dorsal Scapular nerrve Elevates scapula

Flexion of hand & tightens Superficial (4) Upper Limb Rhomboid major Dorsal Scapular nerve Retract scapula Median nerve Palmaris longus palmer aponeurosis Rhomboid minor Dorsal Scapular nerve Retract scapula Flexion & adduction of hand Ulnar nerve Flexor carpi ulnaris Serratus posterior superior Anterior rami of thoracic spinal nerves Rib elevator Flexion of middle and proximal Intermediate Median nerve Flexor digitorum superficialis Intermediate (1) phalanges and hand Serratus posterior inferior Anterior rami of thoracic spinal nerves Rib depressor Anterior (8) Flexion of distal phalanges Median nerve Flexor digitorum profundus Anterior fibers: flexion & medial rotation of humerus Interphalangeal of thumb Middle fibers: abduction of humerus from Deltoid Axillary nerve Metacarpophalangeal of thumb Flexion of Median nerve Flexor pollicis longus 15-90 degrees Deep (3) Carpometacarpal of thumb Posterior fibers: extension & lateral rotation of humerus Pronation of forearm Median nerve Pronator quadratus Supraspinatous Suprascapular nerve Abduction of humerus from 0-15 degrees Helps in holding bones together Shoulder region Forearm Infraspinatous Suprascapular nerve Lateral rotation of humerus Midprone position & flexion of forearm Radial nerve Brachioradialis Lateral (2) Extension Extension and abduction of hand Radial nerve Extensor carpi radialis longus Teres major Lower subscapular nerve Adduction Radial nerve Anconeus Medial rotation of humerus Radial nerve "deep branch" Extensor carpi radialis brevis Teres minor Axillary nerve Lateral rotation of humerus Radial nerve "deep branch" Extensor digitorum Superficial (5) Subscapularis Upper & lower subscapular nerve Medial rotation of humerus Radial nerve "deep branch" Extensor digiti minimi

Radial nerve "deep branch" Extensor carpi ulnaris Posterior (10) Posterior interosseous nerve Supinator

Posterior interosseous nerve Abductor pollicis longus

Posterior interosseous nerve Extensor pollicis brevis Deep (5)

Posterior interosseous nerve Extensor pollicis longus

Posterior interosseous nerve Extensor indices