Q4 Elbow, arm, and forearm

Question 1

What is the sensory supply of the LATERAL upper arm?

Answer 1

• supraclavicular
• upper lateral cutaneous nerve of arm (axillary)
• lower lateral cutaneous nerve of arm (radial)

Question 2

What is the sensory supply of the MEDIAL upper arm?

Answer 2

Medial cutaneous nerve of arm and intercostal brachial nerve

Question 3

What is the sensory supply of the POSTERIOR upper arm?

Answer 3

posterior cutaneous nerve of arm (radial)

Question 4

Muscles of the Upper Arm ANTERIOR COMPARTMENT

Answer 4

1. biceps brachii
2. coracobrachialis
3. brachialis

Question 5

blood supply of the Upper Arm ANTERIOR COMPARTMENT

Answer 5

brachial artery

Question 6

nerve supply of the Upper Arm ANTERIOR COMPARTMENT

Answer 6

musculocutaneous nerve

Question 7

structures passing thru the compartment of the Upper Arm ANTERIOR COMPARTMENT

Answer 7

1. musculocutaneous
2. median and ulnar nerves
3. radial nerve (in lower compartment)
4. brachial artery
5. basilic vein

Question 8

action of the biceps

Answer 8

• SUPINATOR and FLEXOR of ELBOW
• weak SHOULDER FLEXOR

Question 9

action of coracobrachialis

Answer 9

FLEXES ARM and weak ADDUCTOR

Question 10

action of brachialis

Answer 10

FLEXOR of ELBOW

Question 11

at what landmark does the brachial artery become the radial and ulnar arteries

Answer 11

at the neck of the radius

Question 12

at what landmark does the axillary artery becomes the brachial artery

Answer 12

lower border of teres major

Question 13

at what cord does the musculocutaneous nerve come from

Answer 13

lateral cord

Question 14

what part of the musculocutaneous nerve is the sensory supply?

Answer 14

lateral cutaneous nerve of the forearm

Question 15

at what cord does the median nerve come from

Answer 15

medial and lateral cords

Question 16

at what cord does the ulnar nerve come from

Answer 16

medial cord

Question 17

what are the nerves in the anterior compartment of the upper arm

Answer 17

1. musculocutaneous nerve
2. median nerve
3. ulnar nerve
4. radial nerve

Question 18

supplies most muscles in anterior forearm

Answer 18

median nerve

Question 19

Muscles of the Upper Arm POSTERIOR FASCIAL COMPARTMENT

Answer 19

three heads of triceps

Question 20

nerve supply of the Upper Arm POSTERIOR FASCIAL COMPARTMENT

Answer 20

radial nerve

Question 21

blood supply of the Upper Arm POSTERIOR FASCIAL COMPARTMENT

Answer 21

profunda brachii and ulnar collateral arteries

Question 22

structures passing thru the Upper Arm POSTERIOR FASCIAL COMPARTMENT

Answer 22

1. Radial nerve
2. Ulnar nerve

Question 23

action of triceps

Answer 23

EXTENSOR of ELBOW and weak EXTENSOR of shoulder

Question 24

what are the joints of the elbow

Answer 24

1. humero ulnar joint
2. proximal radio ulnar joint

Question 25

location of humero ulnar joint

Answer 25

between distal humerus and proximal ulna

Question 26

locational of proximal radio ulnar joint

Answer 26

between proximal head of the radius and radial notch of proximal ulna

Question 27

what type of joint is the humero ulnar joint

Answer 27

hinge (ginglymus) joint; elbow joint

Question 28

action of humero ulnar joint

Answer 28

flex and extend elbow; 1 degree of freedom

Question 29

what type of joint is the proximal radio ulnar joint

Answer 29

pivot (trochoid) joint

Question 30

action of proximal radio ulnar joint

Answer 30

pronate and supinate forearm; rotates

Question 31

ligaments of the elbow

Answer 31

1. lateral ligament 2. medial ligament 3. annular ligament

Question 32

a triangular ligament with 3 bands

Answer 32

medial ligament (ulnar collateral ligament)

Question 33

the 3 bands of medial ligament

Answer 33

1. anterior bundle = medial epicondyle to coronoid process 2. posterior bundle = medial epicondyle to olecranon 3. transverse band = ulnar attachments of anterior and posterior bands

Question 34

location of medial ligament

Answer 34

medial side of elbow; attached to ulna (hence the other term ulnar collateral ligament)

Question 35

lateral ligament (radial collateral ligament) location

Answer 35

attaches to radial bone

Question 36

lateral ligament (radial collateral ligament) attachment

Answer 36

triangular ligament; attached from apex of lateral epicondyle to base of upper margin of annular ligament

Question 37

annular ligament

Answer 37

- attached to the anterior and posterior margin of radial notch of ulna - forms collar around head of radius - encircles head of radius, stabilizing it in the radial notch

Question 38

boundaries of cubital fossa

Answer 38

1. Superior - imaginary lines connecting epicondyle of humerus 2. medial - pronator teres 3. lateral - brachioradialis 4. floor - brachialis and supinator 5. roof - deep fascia and bicipital aponeurosis

Question 39

carrying angle of cubital fossa

Answer 39

normal value : 170 deg in male; 167 deg in female

Question 40

contents of cubital fossa

Answer 40

- median nerve - bifurcation of brachial artery to ulnar and radial - biceps tendon - radial nerve and deep branches

Question 41

muscle layers of the anterior compartment of forearm

Answer 41

- superficial - deep - intermediate

Question 42

blood supply of the anterior compartment of forearm

Answer 42

radial and ulnar arteries

Question 43

nerve supply of the anterior compartment of forearm

Answer 43

median and ulnar nerves

Question 44

muscles of the SUPERFICIAL LAYER of the anterior compartment of forearm

Answer 44

1. pronator teres 2. flexor carpi radialis 3. palmaris longus 4. flexor carpi ulnaris

Question 45

muscles of the DEEP LAYER of the anterior compartment of forearm

Answer 45

1. flexor pollicis longus 2. flexor digitorum profundus 3. pronator quadratus

Question 46

muscles in the lateral compartment of forearm

Answer 46

1. brachioradialis 2. extensor carpi radialis longus

Question 47

muscles of the SUPERFICIAL LAYER of the posterior compartment of forearm

Answer 47

1. extensor carpi radialis brevis 2. extensor digitorum 3. extensor digiti minimi 4. extensor indicis 5. anconeus

Question 48

muscles of the DEEP LAYER of the posterior compartment of forearm

Answer 48

1. supinator 2. abductor pollicis longus 3. extensor pollicis brevis 4. extensor pollicis longus 5. extensor indicis