11/8/2012
Muscles Stabilizing Pectoral Girdle
Pectoralis minor
Muscles of the Upper Limb 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)
