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Muscles of the Upper Limb
Pectoralis minor
ORIGIN:
anterior surface of ribs 3 โ 5 INSERTION: coracoid process (scapula) Muscles Stabilizing Pectoral Girdle INNERVATION: pectoral nerves ACTION: protracts / depresses scapula (Anterior view)
Serratus anterior
ORIGIN:
ribs 1 - 8 INSERTION: medial border of scapula (Lateral view)
INNERVATION:
long thoracic nerve ACTION: rotates scapula laterally Muscles Stabilizing Pectoral Girdle
Subclavius
ORIGIN:
rib 1 INSERTION: inferior surface of scapula (anterior view)
INNERVATION:
ACTION:
stabilizes / depresses pectoral girdle Muscles Stabilizing Pectoral Girdle
Trapezius
ORIGIN:
occipital bone / spinous processes of C 7 โ T 12 INSERTION: acromion / spine of scapula; lateral third of clavicle (Posterior view) Muscles Stabilizing Pectoral Girdle INNERVATION: accessory nerve ACTION: stabilizes / elevates / retracts / rotates scapula
Levator scapulae
ORIGIN:
transverse processes of C 1 โ C 4 INSERTION: upper medial border of scapula (Posterior view)
INNERVATION:
dorsal scapular nerve ACTION: elevates / adducts scapula Muscles Stabilizing Pectoral Girdle
ORIGIN:
spinous processes of C 7 โ T 5 INSERTION: medial border of scapula (Posterior view)
Rhomboids
(major / minor) Muscles Stabilizing Pectoral Girdle INNERVATION: dorsal scapular nerve ACTION: adducts / rotates scapula
Pectoralis major
ORIGIN:
sternum / clavicle / ribs 1 โ 6 INSERTION: intertubucular sulcus / greater tubercle (humerus) (Anterior view) Muscles Moving Arm INNERVATION: dorsal scapular nerve ACTION: flexes / medially rotates / adducts arm
Deltoid
ORIGIN:
acromion / spine of scapula; lateral third of clavicle INSERTION: deltoid tuberosity (humerus) (Anterior view)
INNERVATION:
axillary nerve ACTION: abducts arm Muscles Moving Arm
Latissimus dorsi
(Posterior view)
ORIGIN:
spinous processes of T7 โ L5; ribs 9 โ 12; iliac crest of os coxae INSERTION: intertubercular groove (humerus) Muscles Moving Arm INNERVATION: thoracodorsal nerve ACTION: extends / adducts arm
Subscapularis
(Posterior view) Muscles Moving Arm ORIGIN: subscapular fossa (scapula) INSERTION: lesser tubercle (humerus)
INNERVATION:
subscapular nerve ACTION: rotates arm medially
Supraspinatus
ORIGIN:
supraspinous fossa (scapula) INSERTION: greater tubercle (humerus) (Posterior view) Muscles Moving Arm INNERVATION: suprascapular nerve ACTION: abducts arm
Biceps brachii
ORIGIN:
coracoid process / body (scapula) INSERTION: radial tuberosity (radius) INNERVATION: musculocutaneous nerve ACTION: flexes forearm (Anterior view) Muscles Moving Forearm
Brachialis
(Anterior view) Muscles Moving Forearm ORIGIN: anterior face of distal humerus INSERTION: coronoid process (ulna) INNERVATION: musculocutaneous nerve ACTION: flexes forearm
Brachioradialis
(Anterior / Lateral view) Muscles Moving Forearm ORIGIN: lateral epicondyle (humerus) INSERTION: styloid process (radius) INNERVATION: radial nerve ACTION: flexes forearm
Pronator teres
ORIGIN:
medial epicondyle (humerus); coronoid process (ulna) INSERTION: lateral shaft of radius INNERVATION: median nerve ACTION: pronates forearm (Anterior view) Muscles Moving Wrist, Hand, and Fingers
Flexor carpi radialis
(Anterior view)
ORIGIN:
medial epicondyle (humerus) INSERTION: metacarpals 2 โ 3 INNERVATION: median nerve ACTION: flexes / abducts wrist Muscles Moving Wrist, Hand, and Fingers
Palmaris longus
(Anterior view)
ORIGIN:
medial epicondyle (humerus) INSERTION: palmar aponeurosis INNERVATION: median nerve ACTION: tenses skin of palm Muscles Moving Wrist, Hand, and Fingers
Flexor carpi ulnaris
(Anterior view) Muscles Moving Wrist, Hand, and Fingers ORIGIN: medial epicondyle (humerus); olecranon process (ulna) INSERTION: pisiform / hamate of carpals INNERVATION: ulnar nerve ACTION: flexes / adducts wrist
Flexor digitorum superficialis
(Anterior view) Muscles Moving Wrist, Hand, and Fingers ORIGIN: medial epicondyle (humerus); coronoid process (ulna); shaft of radius INSERTION: middle phalanges 2 - 5 INNERVATION: median nerve ACTION: flexes wrist / fingers
Flexor digitorum profundus
(Anterior view) Muscles Moving Wrist, Hand, and Fingers ORIGIN: coronoid process / anteriolmedial surface (ulna) INSERTION: distal phalanges 2 - 5 INNERVATION: ulnar / median nerves ACTION: flexes wrist / fingers
Flexor pollicis longus
(Anterior view) Muscles Moving Wrist, Hand, and Fingers ORIGIN: anterior surface of radius INSERTION: distal phalanx of thumb INNERVATION: median nerve ACTION: flexes thumb
Pronator quadratus
(Anterior view) Muscles Moving Wrist, Hand, and Fingers ORIGIN: distal surface of anterior ulna INSERTION: distal surface of anterior radius INNERVATION: median nerve ACTION: pronates forearm
Extensor carpi radialis
(Posterior / Lateral view) Muscles Moving Wrist, Hand, and Fingers ORIGIN: lateral epicondyle (humerus) INSERTION: metacarpals 2 - 3 INNERVATION: radial nerve ACTION: extends / abducts wrist
