Upper Limb Model 1

Question 1

1a.
1b.
c. innervation
d. action

Answer 1

1a: biceps brachii short head
1b: biceps brachii long head
c. musculocutaneous nerve
d. supinates and flexes forearm

Question 2

2

a. innervation

Answer 2

brachioradialis muscle:

a. radial nerve

Question 3

3

a. innervation

Answer 3

pronator teres muscle:

a. median nerve

Question 4

4

a. innervation

Answer 4

flexor carpi radialis muscle:

a. median nerve

Question 5

5

a. innervation

Answer 5

palmaris longus muscle:

a. median nerve

Question 6

6

a. innervation

Answer 6

flexor carpi ulnaris muscle:

a. ulnar nerve

Question 7

7

a. innervation

Answer 7

extensor carpi radialis longus muscle:

a. radial nerve

Question 8

8

a. innervation

Answer 8

extensor carpi radialis brevis muscle:

a. radial nerve

Question 9

9

a. innervation

Answer 9

abductor pollicis longus muscle:

Question 10

10

a. innervation

Answer 10

extensor pollicis longus muscle

a. radial nerve

Question 11

11

a. innervation
b. action

Answer 11

brachialis muscle:

a. musculocutaneous nerve
b. flexes forearm (in all positions)

Question 12

12

a. innervation

Answer 12

extensor digitorum muscle:

a. radial nerve

Question 13

13

a. innervation

Answer 13

extensor digiti minimi muscle:

a. radial nerve

Question 14

14

a. innervation

Answer 14

extensor carpi ulnaris muscle:

a. radial nerve

Question 15

15

a. innervation
b. action

Answer 15

lateral head of triceps brachii muscle:

a. radial nerve
b. chief extensor of forearm

Question 16

16

a. innervation
b. action

Answer 16

long head of triceps brachii muscle:

a. radial nerve
b. chief extensor of forearm

Question 17

17

a. innervation
b. action

Answer 17

medial head of triceps brachii muscle:

a. radial nerve
b. chief extensor of forearm

Question 18

18

a. innervation
b. action

Answer 18

levator scapulae muscle:

a. dorsal scapular nerve
b. elevates and rotates scapula inferiorly

Question 19

19

a. innervation
b. action

Answer 19

rhomboids minor muscle:

a. dorsal scapular nerve
b. retract and rotate scapula

Question 20

20

a. innervation
b. action

Answer 20

rhomboids major muscle:

a. dorsal scapular nerve
b. retract and rotate scapula

Question 21

21

a. innervation
b. action

Answer 21

trapezius muscle:

a. spinal accessory nerve (CN XI)
b. elevate, retract, and depress scapula (rotates scapula superiorly)

Question 22

22

a. innervation
b. action

Answer 22

latissimus dorsi muscle:

a. thoracodorsal nerve
b. extends, adducts, medially rotates humerus

Question 23

23

a. innervation
b. action

Answer 23

serratus anterior muscle:

a. long thoracic nerve
b. rotates the scapula

Question 24

24

Answer 24

serratus posterior muscle:

Question 25

25

Answer 25

erector spinae muscle