11/8/2012
Muscles Stabilizing Pectoral Girdle Muscles of the Upper Limb Pectoralis minor ORIGIN: INNERVATION: anterior surface of pectoral nerves ribs 3 – 5 ACTION: INSERTION: protracts / depresses scapula coracoid process (scapula)
(Anterior view)
Muscles Stabilizing Pectoral Girdle Muscles Stabilizing Pectoral Girdle Serratus anterior Subclavius
ORIGIN: INNERVATION: ORIGIN: INNERVATION: ribs 1 - 8 long thoracic nerve rib 1 ------
INSERTION: ACTION: INSERTION: ACTION: medial border of scapula rotates scapula laterally inferior surface of scapula stabilizes / depresses pectoral girdle
(Lateral view) (anterior view)
Muscles Stabilizing Pectoral Girdle Muscles Stabilizing Pectoral Girdle Trapezius Levator scapulae
ORIGIN: INNERVATION: ORIGIN: INNERVATION:
occipital bone / spinous accessory nerve transverse processes of C1 – C4 dorsal scapular nerve
processes of C7 – T12 ACTION: INSERTION: ACTION: INSERTION: stabilizes / elevates / retracts / upper medial border of scapula elevates / adducts scapula acromion / spine of scapula; rotates scapula lateral third of clavicle
(Posterior view) (Posterior view)
1 11/8/2012
Muscles Stabilizing Pectoral Girdle Muscles Moving Arm Rhomboids Pectoralis major (major / minor) ORIGIN: INNERVATION: ORIGIN: INNERVATION: spinous processes of C7 – T5 dorsal scapular nerve sternum / clavicle / ribs 1 – 6 dorsal scapular nerve
INSERTION: ACTION: INSERTION: ACTION: medial border of scapula adducts / rotates scapula intertubucular sulcus / greater tubercle flexes / medially rotates / (humerus) adducts arm
(Posterior view) (Anterior view)
Muscles Moving Arm Muscles Moving Arm Deltoid Latissimus dorsi
ORIGIN: INNERVATION: ORIGIN: INNERVATION: acromion / spine of scapula; axillary nerve spinous processes of T7 – L5; thoracodorsal nerve lateral third of clavicle ribs 9 – 12; iliac crest of os coxae ACTION: ACTION: INSERTION: abducts arm INSERTION: extends / adducts arm deltoid tuberosity intertubercular groove (humerus) (humerus)
(Anterior view) (Posterior view)
Muscles Moving Arm Muscles Moving Arm Subscapularis Supraspinatus
ORIGIN: INNERVATION: ORIGIN: INNERVATION: subscapular fossa subscapular nerve supraspinous fossa suprascapular nerve (scapula) (scapula) ACTION: ACTION: INSERTION: rotates arm medially INSERTION: abducts arm lesser tubercle greater tubercle (humerus) (humerus)
(Posterior view) (Posterior view)
2 11/8/2012
Muscles Moving Arm Muscles Moving Arm Infraspinatus Teres minor
ORIGIN: INNERVATION: ORIGIN: INNERVATION: infraspinous fossa suprascapular nerve lateral border of scapula subscapular nerve (scapula) ACTION: INSERTION: ACTION: INSERTION: rotates arm laterally greater tubercle rotates arm laterally greater tubercle (humerus) (humerus)
(Posterior view) (Posterior view)
Muscles Moving Arm Muscles Moving Arm Teres major Coracobrachialis
ORIGIN: INNERVATION: ORIGIN: INNERVATION: inferior border of scapula subscapular nerve coracoid process musculocutaneous nerve (scapula) INSERTION: ACTION: ACTION: lesser tubercle rotates arm medially; INSERTION: flexes / adducts arm (humerus) adducts arm medial shaft of humerus
(Posterior view) (Anterior view)
Muscles Moving Forearm Muscles Moving Forearm Triceps brachii Anconeus
ORIGIN: ORIGIN: below glenoid cavity of scapula; lateral epicondyle posterior shaft of humerus (humerus)
INSERTION: INSERTION: olecranon process olecranon process (ulna) (ulna)
INNERVATION: INNERVATION: radial nerve radial nerve
ACTION: ACTION: extends forearm extends forearm
(Posterior view) (Posterior view)
3 11/8/2012
Muscles Moving Forearm Muscles Moving Forearm Biceps brachii Brachialis
ORIGIN: ORIGIN: coracoid process / body anterior face of distal humerus (scapula) INSERTION: INSERTION: coronoid process radial tuberosity (ulna) (radius) INNERVATION: INNERVATION: musculocutaneous nerve musculocutaneous nerve ACTION: ACTION: flexes forearm flexes forearm
(Anterior view) (Anterior view)
Muscles Moving Forearm Muscles Moving Wrist, Hand, and Fingers Brachioradialis Pronator teres
ORIGIN: ORIGIN: lateral epicondyle medial epicondyle (humerus); (humerus) coronoid process (ulna)
INSERTION: INSERTION: styloid process lateral shaft of radius (radius) INNERVATION: INNERVATION: median nerve radial nerve ACTION: ACTION: pronates forearm flexes forearm
(Anterior / Lateral view) (Anterior view)
Muscles Moving Wrist, Hand, and Fingers Muscles Moving Wrist, Hand, and Fingers Flexor carpi radialis Palmaris longus
ORIGIN: ORIGIN: medial epicondyle medial epicondyle (humerus) (humerus)
INSERTION: INSERTION: metacarpals 2 – 3 palmar aponeurosis
INNERVATION: INNERVATION: median nerve median nerve
ACTION: ACTION: flexes / abducts wrist tenses skin of palm
(Anterior view) (Anterior view)
4 11/8/2012
Muscles Moving Wrist, Hand, and Fingers Muscles Moving Wrist, Hand, and Fingers Flexor carpi ulnaris Flexor digitorum superficialis
ORIGIN: ORIGIN: medial epicondyle (humerus); medial epicondyle (humerus); olecranon process (ulna) coronoid process (ulna); shaft of radius INSERTION: pisiform / hamate of carpals INSERTION: middle phalanges 2 - 5 INNERVATION: ulnar nerve INNERVATION: median nerve ACTION: flexes / adducts wrist ACTION: flexes wrist / fingers
(Anterior view) (Anterior view)
Muscles Moving Wrist, Hand, and Fingers Muscles Moving Wrist, Hand, and Fingers Flexor digitorum profundus Flexor pollicis longus
ORIGIN: ORIGIN: coronoid process / anterior surface of radius anteriolmedial surface (ulna) INSERTION: INSERTION: distal phalanx of thumb distal phalanges 2 - 5 INNERVATION: INNERVATION: median nerve ulnar / median nerves ACTION: ACTION: flexes thumb flexes wrist / fingers
(Anterior view) (Anterior view)
Muscles Moving Wrist, Hand, and Fingers Muscles Moving Wrist, Hand, and Fingers Pronator quadratus Extensor carpi radialis
ORIGIN: ORIGIN: distal surface of anterior ulna lateral epicondyle
(humerus) INSERTION: distal surface of anterior radius INSERTION:
metacarpals 2 - 3 INNERVATION: median nerve INNERVATION: radial nerve ACTION: pronates forearm ACTION: extends / abducts wrist
(Anterior view) (Posterior / Lateral view)
5 11/8/2012
Muscles Moving Wrist, Hand, and Fingers Muscles Moving Wrist, Hand, and Fingers Extensor digitorum Extensor carpi ulnaris
ORIGIN: ORIGIN: lateral epicondyle lateral epicondyle (humerus) (humerus)
INSERTION: INSERTION: distal phalanges 2 – 5 metacarpal 5
INNERVATION: INNERVATION: radial nerve radial nerve
ACTION: ACTION: extends fingers extends / adducts wrist
(Posterior view) (Posterior view)
Muscles Moving Wrist, Hand, and Fingers Muscles Moving Wrist, Hand, and Fingers Supinator Abductor pollicis longus
ORIGIN: ORIGIN: lateral epicondyle (humerus); posterior surface of radius / ulna proximal end of ulna INSERTION: INSERTION: metacarpal 1; trapezium of carpals proximal end of radius INNERVATION: INNERVATION: radial nerve radial nerve ACTION: ACTION: abducts / extends thumb suppinates forearm
(Anterior / Lateral view) (Posterior view)
Muscles Moving Wrist, Hand, and Fingers Muscles Moving Wrist, Hand, and Fingers Extensor pollicis Extensor indicis
ORIGIN: ORIGIN: dorsal shaft of radius / ulna posterior surface of distal ulna
INSERTION: INSERTION: proximal / distal ends of phalange 1 phalange 2
INNERVATION: INNERVATION: radial nerve radial nerve
ACTION: ACTION: extends thumb extends index finger
(Posterior view) (Posterior view)
6