upper extremity 3, 4

Question 1

upper arm: anterior (flexors) muscles

Answer 1

biceps brachii, brachialis, coracobrachialis

Question 2

upper arm: anterior (flexors) innervation

Answer 2

musculocutaneous nerve

Question 2

coracobrachialis actions

Answer 2

helps flex and adduct shoulder

Question 3

brachialis actions

Answer 3

elbow flexion

Question 3

biceps brachii actions

Answer 3

supination of forearm, elbow flexion while supinated
shoulder flexion

Question 4

triceps brachii actions

Answer 4

elbow extension

long head extends shoulder

Question 5

upper arm: posterior (extenders) innervation

Answer 5

radial nerve

Question 6

anconeus: actions

Answer 6

assists triceps in elbow extension, stabilizes elbow
abducts ulna during pronation

Question 7

transverse humeral ligament: location, function

Answer 7

runs from greater to lesser tubercle of humerus
converts intertubercular groove into canal for long head tendon

Question 8

median nerve location

Answer 8

descends into cubital fossa
deep to bicipital aponeurosis

Question 9

ulnar nerve location

Answer 9

posterior to medial epicondyle
distal on medial side of brachial artery

Question 10

lateral cutaneous nerve: branch of? and location

Answer 10

branch of musculocutaneous, emerges lateral to biceps brachii

Question 11

injury to musculocutaneous nerve

Answer 11

anterior compartment paralysis
impaired/weak flexion, supination
possible lateral forearm sensation loss

Question 12

radial nerve: location

Answer 12

curves around humerus in radial groove, divides into deep and superficial branches in cubital fossa

Question 13

radial nerve: injury superior to branches

Answer 13

triceps, brachioradialis, supinator, wrist/finger extensor paralysis

Question 14

radial nerve: injury in radial groove

Answer 14

weakened triceps, medial head affected. posterior muscles supplied by distal branches are paralyzed

wrist drop: can’t extend fingers and wrist at metacarpophalangeal joints

Question 15

posterior branches of brachial artery

Answer 15

profunda brachii, superior and inferior ulnar collateral

Question 16

flexors that cross elbow joint

Answer 16

superficial and intermediate

Question 17

tendons of flexors: location

Answer 17

pass across anterior wrist
held in place by palmar and carpal ligament, flexor retinaculum

Question 18

pronator teres function

Answer 18

pronation, elbow flexion

Question 19

flexor carpi radialis function

Answer 19

flexion, abduction of hand at wrist

Question 20

palmaris longus function

Answer 20

flexes hand at wrist, tenses palmar aponeurosis

Question 21

flexor carpi ulnaris function

Answer 21

flexion and adduction of hand at wrist

Question 22

superficial forearm common attachment

Answer 22

medial epicondyle

Question 23

median nerve innervates

Answer 23

pronator teres, flexor carpi radialis, palmaris longus, flexor digitorum superficialis, lateral flexor digitorum profundus

Question 24

intermediate forearm muscles

Answer 24

flexor digitorum superficialis

Question 25

flexor digitorum superficialis function

Answer 25

wrist, carpometacarpal flexion
PIPJ flexion

Question 26

deep forearm muscles

Answer 26

flexor digitorum profundus, flexor pollicis longus, pronator quadratus

Question 27

flexor digitorum profundus functions

Answer 27

wrist, carpometacarpal flexion
DIPJ flexion

Question 28

flexor pollicis longus functions

Answer 28

wrist, carpometacarpal flexion
MPJ/IPJ flexion of thumb

Question 29

pronator quadratus functions

Answer 29

forearm pronation

Question 30

anterior interosseus nerve: origination

Answer 30

median nerve