Lecture 7- Elbow and Wrist

Question 1

This angle occurs because of the way the articulation surfaces come together when the arm is in anatomical position and varies from 5-15 degrees

Answer 1

carrying angle

Question 2

What kind of joint is the humeroulnar joint and how many degrees of freedom does it have?

Answer 2

Hinge joint with 1 degree of freedom

Question 3

Supination is palm ___

Answer 3

up

Question 4

Pronation is palm ___

Answer 4

down

Question 5

What are the two movements at the radioulnar joint?

Answer 5

Supination and pronation

Question 6

Which elbow ligament is the strongest?

Answer 6

Medial (ulnar) collateral ligament

Question 7

What are the four elbow ligaments?

Answer 7

Medial (ulnar) collateral ligament, Lateral collateral ligament, annular ligament, and quadrate ligament

Question 8

Which ligament wraps around the head of the radius?

Answer 8

Annular

Question 9

Name the three flexors of the forearm

Answer 9

Biceps brachii, brachialis, and brachioradialis

Question 10

Name the two extensors of the forearm

Answer 10

Triceps, anconeus

Question 11

Which muscle is the primary mover for elbow flexion?

Answer 11

biceps brachii

Question 12

Which muscle is pure elbow flexor and is unaffected by supination or pronation?

Answer 12

brachialis

Question 13

Prime mover for supination

Answer 13

Supinator

Question 14

What are the two muscles for supination?

Answer 14

supinator and biceps brachii

Question 15

Prime mover for pronation

Answer 15

pronator quadratus

Question 16

What are the two muscles used for pronation?

Answer 16

pronator quadratus and pronator teres

Question 17

This muscle is active when you have the person do elbow flexion with their thumb pointing up

Answer 17

brachioradialis

Question 18

This muscle is active when you have the person do elbow flexion with their palm up

Answer 18

bicep

Question 19

This muscle is active when you have the person do elbow flexion with their palm facing down

Answer 19

brachialis

Question 20

This muscle is a good supinator when the elbow is flexed to 90 degrees

Answer 20

biceps brachii

Question 21

The wrist is a ______ joint with __ degrees of freedom

Answer 21

biaxial joint with 2 degrees of freedom

Question 22

T/F: Several muscles attach to the proximal row of carpal bones

Answer 22

False - no muscles attach

Question 23

Name the 6 wrist flexors

Answer 23

1. Palmaris longus
2. Flexor carpi radialis
3. Flexor carpi ulnaris
4. Flexor digitorum superficialis
5. Flexor digitorum profundus
6. Flexor pollicis longus

Question 24

Name the 3 primary wrist extensors

Answer 24

1. Extensor carpi radialis longus
2. Extensor carpi radialis brevis
3. Extensor carpi ulnaris

Question 25

Which muscles contribute to radial deviation?

Answer 25

ECRL and brevis | FCR

Question 26

Which muscles contribute to ulnar deviation?

Answer 26

ECU and FCU