MSK 5 - Posterior forearm and hand

Question 1

All the muscles in the posterior forearm are supplied by…

Answer 1

radial nerve

Question 2

Superficial muscles of the forearm

Answer 2

• brachioradialis
• extensor carpi radialis brevis
• extensor carpi radialis longus
• extensor digitorum
• extensor digiti minimi
• extensor carpi ulnaris

Question 3

Common origin of superficial muscles of the posterior forearm?

Answer 3

lateral epicondyle of humerus

Question 4

5 deep muscles of posterior forearm

Answer 4

• supinator
• extensor indicis
• extensor pollicus longus
• extensor pollicis brevis
• abductor pollicis longus

Question 5

Which deep muscles attach superficially to the thumb?

Answer 5

• extensor pollicus longus
• extensor pollicis brevis
• abductor pollicis longus

Question 6

Where does the extensor indicis arise from?

Answer 6

extensor digitorum tendon

Question 7

What do all the extensors do?

Answer 7

extend at the wrist

Question 8

What does the brachialis do?

Answer 8

flex elbow, supinate elbow

Question 9

What is the anatomical snuff box consist of?

LBL

Answer 9

• EPL
• EPB
• APL

Question 10

What structures are found in the snuff box?

Answer 10

• radial artery
• radial nerve
• cephalic vein

Question 11

Of the structures in the posterior forearm, which one gives rise to 4 tendons?

Answer 11

extendor digitorum - one tendon to each finger

Question 12

What contributes to the stability of the shoulder joint?

Answer 12

• rotator cuff muscles

- glenoid labrum

Question 13

Radial nerve palsy will lead to..

Answer 13

a wrist drop

Question 14

Median nerve palsy is caused by..

Answer 14

carpal tunnel syndrome

Question 15

What forms the elbow joint?

Answer 15

• trochlear notch of the ulnar

- trochlea of humerus

Question 16

What nerve passes posteriorly to the elbow joint?

Answer 16

ulnar nerve

Question 17

Movements of the wrist joint

Answer 17

• extension
• flexion
• adduction
• abduction