AOI: Muscle and Action deck (lab 5)

Lab 5: Myology: Pectoral Area and Ventral Upper Limb

pectoralis major

adducts, flexes, and medially rotates arm

latissimus dorsi

adducts, extends, and medially rotates arm

deltoid

abducts, flexes, and rotates arm medially and laterally

trapezius

• adducts and rotates scapula

• elevation and depression of scapula

levator scapulae

• elevation of scapula

• lateral neck flexion

pectoralis minor

stabilizes, abducts and rotates scapula

subscapularis

• medial rotation of arm

• stabilizes humerus head in glenoid cavity

infraspinatus

• lateral rotation of arm

• stabilizes humerus head in glenoid cavity

supraspinatus

• abduction of arm

• stabilizes humerus head in glenoid cavity

teres minor

• lateral rotation and adduction of arm

• stabilizes humerus head in glenoid cavity

teres major

• medial rotation

• adduction & extension of arm

coracobrachialis

flexion and adduction of arm

biceps brachii (long and short head)

supination and flexion of forearm

brachialis

flexion of forearm

triceps brachii (long, lateral, and medial head)

• extension of forearm

• stabilizes shoulder joint

brachioradialis

• flexion of forearm

• pronation of forearm (when supinated)

• supination of forearm (when pronated)

flexor carpi radialis

wrist flexion and hand abduction

palmaris longus

wrist flexion (weak)

flexor carpi ulnaris

wrist flexion and hand adduction

pronator teres

forearm pronation

flexor pollicis longus

flexion of thumb

flexor digitorum profundus

flexion of wrist and fingers (2-5)

supinator

supination of forearm

flexor carpi radialis

wrist flexion and hand abduction

palmaris longus

wrist flexion (weak)

flexor carpi ulnaris

wrist flexion and hand adduction

pronator teres

forearm pronation

extensor carpi radialis longus

extension of wrist and abduction of hand

extensor carpi radialis brevis

extension of wrist and abduction of hand

extensor digitorum

extension of wrist and fingers (2-5)

extensor carpi ulnaris

• extension of wrist

• adduction of wrist

abductor pollicis longus

abduction and extension of thumb

extensor pollicis longus

extension of thumb

supinator

supination of forearm