Midt- Lec. 13 Forearm/wrist

Question 1

What are the muscles in the anterior compartment of the forearm

Answer 1

Most: FLEXOR or PRONATOR
Pronator Teres, pronator quadratus, flexor carpi radialis (superficial layer), flexor carpi ulnaris (superficial layer), palmaris longus (superficial layer), flexor digitorum superficialis (intermediate layer) flexor digitorum profundus (deep layer), flexor pollicis longus (deep layer)

Question 2

Actions of “Flexor” and “Palmaris” muscles of forearm

Answer 2

Flexes wrist

Question 3

Actions of “Pronator” forearm muscles

Answer 3

Pronates forearm

Question 4

What are the muscles in the posterior compartment of the forearm

Answer 4

Supinator, brachioradialis, extensor carpi radialis longus (superficial layer), extensor carpi radialis brevis (superficial layer), extensor carpi ulnaris (superficial layer), extensor digitorum (superficial layer), extensor digiti minimi (superficial layer), extensor indicis (deep layer), abductor pollicis longus (deep layer), extensor pollicis longus (deep layer), extensor pollicis brevis (deep layer)

Question 5

Muscles that flex / extend the wrist/digits

Answer 5

Flexion:
- flex usually in name 
Extension:
- exten usually in name
Carpi = wrist 
Digit/poll = digits

Question 6

Muscles that abduct and adduct the wrist

Answer 6

Abduction of the wrist moves the hand toward the radius
- caused by the 3 radialis muscles
Addiction of the wrist moves the hand toward the Ulna
- caused by the 2 ulnaris muscles

Question 7

Attachments of the Deep Anterior muscles of the forearm

Answer 7

O: anterior surfaces of ulna and radius
I: phalanges

Question 8

Attachments of the Superior Anterior muscles

Answer 8

O: medial epicondyle of the humerus
I: metacarpals and phalanges

Question 9

What action do anterior forearm muscles typically do

Answer 9

Flexion

Question 10

What are the carpal bones

Answer 10

Starting at the thumb

• Scaphoid
• Lunate
• Triquetrum
• Pisiform
• Trapezium
• Trapezoid
• Capitate
• Hamate