11/8/2012
Muscles Stabilizing Pectoral Girdle
Muscles of the Upper Limb
Pectoralis minor
ORIGIN:
INNERVATION:
anterior surface of
ribs 3 – 5
pectoral nerves
INSERTION:
protracts / depresses scapula
ACTION:
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
processes of C7 – T12
accessory nerve
transverse processes of C1 – C4
dorsal scapular nerve
ACTION:
INSERTION:
ACTION:
INSERTION:
stabilizes / elevates / retracts /
rotates scapula
upper medial border of scapula
elevates / adducts scapula
acromion / spine of 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 /
adducts arm
(humerus)
(Posterior view)
(Anterior view)
Muscles Moving Arm
Muscles Moving Arm
Deltoid
Latissimus dorsi
ORIGIN:
INNERVATION:
ORIGIN:
INNERVATION:
acromion / spine of scapula;
lateral third of clavicle
axillary nerve
spinous processes of T7 – L5;
ribs 9 – 12; iliac crest of os coxae
thoracodorsal nerve
INSERTION:
abducts arm
INSERTION:
extends / adducts arm
ACTION:
ACTION:
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:
INSERTION:
rotates arm medially
ACTION:
INSERTION:
lesser tubercle
greater tubercle
(humerus)
(humerus)
(Posterior view)
abducts arm
(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)
INSERTION:
ACTION:
INSERTION:
ACTION:
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:
lesser tubercle
rotates arm medially;
adducts arm
(humerus)
ACTION:
INSERTION:
flexes / 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;
posterior shaft of humerus
lateral epicondyle
(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:
flexes forearm
flexes forearm
ACTION:
(Anterior view)
(Anterior view)
Muscles Moving Forearm
Muscles Moving Wrist, Hand, and Fingers
Pronator teres
Brachioradialis
ORIGIN:
ORIGIN:
lateral epicondyle
medial epicondyle (humerus);
coronoid process (ulna)
(humerus)
INSERTION:
INSERTION:
styloid process
lateral shaft of radius
(radius)
INNERVATION:
INNERVATION:
radial nerve
median nerve
ACTION:
flexes forearm
pronates forearm
ACTION:
(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);
olecranon process (ulna)
medial epicondyle (humerus);
coronoid process (ulna);
shaft of radius
INSERTION:
INSERTION:
pisiform / hamate of carpals
middle phalanges 2 - 5
INNERVATION:
INNERVATION:
ulnar nerve
median nerve
ACTION:
ACTION:
flexes / adducts wrist
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:
coronoid process /
anteriolmedial surface (ulna)
ORIGIN:
anterior surface of radius
INSERTION:
distal phalanx of thumb
INSERTION:
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
ORIGIN:
distal surface of anterior ulna
Extensor carpi radialis
ORIGIN:
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:
posterior surface of radius / ulna
lateral epicondyle (humerus);
proximal end of ulna
INSERTION:
metacarpal 1; trapezium of carpals
INSERTION:
proximal end of radius
INNERVATION:
radial nerve
INNERVATION:
radial nerve
ACTION:
abducts / extends thumb
ACTION:
suppinates forearm
(Anterior / Lateral view)
(Posterior view)
Muscles Moving Wrist, Hand, and Fingers
Muscles Moving Wrist, Hand, and Fingers
Extensor pollicis
Extensor indicis
ORIGIN:
dorsal shaft of radius / ulna
ORIGIN:
posterior surface of distal ulna
INSERTION:
proximal / distal ends of phalange 1
INSERTION:
phalange 2
INNERVATION:
radial nerve
INNERVATION:
radial nerve
ACTION:
extends thumb
ACTION:
extends index finger
(Posterior view)
(Posterior view)
6