A&F

Question 1

What are the muscles of the anterior arm?

Answer 1

biceps brachii
coracobrachilais
brachialis

Question 2

What nerve supplies the anterior arm?

Answer 2

musculocutaneous n.

C5, 6, 7

Question 3

What nerve pierces coracobrachialis?

Answer 3

musculocutaneous n.

C5, 6, 7

Question 4

What muscles are in the posterior arm?

Answer 4

triceps brachii

Question 5

What nerve supplies the posterior arm?

Answer 5

radial n.

C5, 6, 7, 8, T1

Question 6

What are the two muscles involved in pronation?

Answer 6

pronator teres m.

pronator quadratus m.

Question 7

What muscle comes around the lateral edge of the forearm so that its kind of looks like its in anterior and posterior compartments but is actually posterior?

Answer 7

brachioradialis m.

Question 8

What are the associated function of the anterior compartment of the forearm?

Answer 8

wrist movements
flexion of digits and thumb
pronation

Question 9

How many layers does the anterior forearm have?

Answer 9

3 layers:

superficial (4)
Intermediate (1)
deep (3)

Question 10

What nerve(s) supply the anterior forearm?

Answer 10

Median (mostly median) and ulnar n.

C6, 7, 8, T1

Question 11

What are the muscles of the anterior forearm, from medial to lateral?

Answer 11

Flexor carpi ulnaris
palmaris longus
flexor carpi radialis
pronator teres

Question 12

What nerve passes through the two heads of flexor carpi ulnaris?

Answer 12

ulnar n.

C8 - T1

Question 13

What nerve passes through the two heads of the pronator teres m?

Answer 13

median n.

C6, 7, 8, T1

Question 14

What nerve is messed up when you have pronator syndrome?

Answer 14

median n.

C6, 7, 8, T1

Question 15

What is the intermediate muscle of the anterior forearm?

Answer 15

flexor digitorum superficialis

Question 16

What are the deep muscles of the anterior forearm from medial to lateral?

Answer 16

flexor digitorum profundus
flexor pollicus longus
pronator quadratus

Question 17

What creates the carpal tunnel?

Answer 17

flexor retinaculum

Question 18

How many layers does the posterior forearm have?

Answer 18

2 layers:

superficial (7)
deep (5)

Question 19

What are the movements associated with the posterior forearm?

Answer 19

movement of wrist
extension of fingers and thumb
supination

Question 20

What nerve is associated with the superficial muscles of the posterior forearm?

Answer 20

radial n.

C5, 6, 7, 8

Question 21

What are the muscles of the superficial posterior forearm from lateral to medial?

Answer 21

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

Question 22

What nerve is associated with the muscles of the deep posterior forearm?

Answer 22

posterior interosseus n.

Question 23

What are the muscles of the deep posterior forearm from lateral to medial?

Answer 23

supinator
abductor pollicus longus
extensor pollicus  brevis
extensor pollicus longus
extensor indicis

Question 24

What is the path of the musculocutaneous n.?

Answer 24

1. pierces coracobrachialis and supplies it
2. continues into biceps (supplies all of this) and brachialis (supplies half of this)
3. emerges between biceps/brachialis as lateral antebrachial cutaneous n.
4. supplies skin of lateral forearm

Question 25

What is the path of the median n.?

Answer 25

1. runs down medial aspect of arm lateral to brachial a. 2. crosses over brachial a. to medial side, enters cubital fossa 3. runs between flexor digitorum superficialis and profundus 4. supplies most muscles of anterior forearm 5. continues under carpal tunnel to supply lateral hand through the palmar branch

Question 26

Why is the palmar branch of the median n. important?

Answer 26

If you have carpal tunnel syndrome, your palmar branch is unaffected--maintain sensation in lateral hand

Question 27

What is the path of the ulnar n.?

Answer 27

1. travels posteriorly down medial aspect of arm 2. runs in cubital tunnel between medial epicondyle and olecranon (funny bone) 3. dives into medial forearm (with ulnar a.) to supply it 4. continues over carpal tunnel to supply medial and deep hand

Question 28

What is the path of the radial n.?

Answer 28

1. runs with deep brachial a. in radial groove of humerus (emerges from triangular interval) 2. continues between brachialis and brachioradialis 3. supplies all of triceps brachii and lateral brachialis 4. divides into superficial (skin on back of hand) and deep (posterior mm. of forearm) branches

Question 29

What is the path of the brachial a.?

Answer 29

1. direct continuation of axillary a., becomes brachial at inferior border of teres major 2. splits into radial and ulnar aa. (also sends of deep brachial a. before bifurcation) 3. sends off superior and inferior ulnar collateral aa.