Anterior Forearm

Question 1

muscles of superficial layer of anterior forearm (medial to lateral)

Answer 1

Flexor carpi ulnaris
Palmaris longus
Flexor carpi radialis
Pronator teres

Question 2

muscles of intermediate layer of anterior forearm

Answer 2

flexor digitorum SUPERFICIALIS M

Question 3

muscles of deep layer of anterior forearm (medial to lateral)

Answer 3

flexor digitorum profundus
Flexor pollicus longus
Pronator quadratus

Question 4

cutaneous innervation of lateral proximal arm

Answer 4

axillary n

Question 5

cutaneous innervation of the lateral distal arm

Answer 5

radial n

also innervates the anatomical snuffbox

Question 6

cutaneous innervation of the armpit to medial epicondyle

Answer 6

medial brachial cutaneous n

Question 7

cutaneous innervation of medial forearm (and some biceps)

Answer 7

medial antibrachial n

Question 8

cutaneous innervation of lateral forearm

Answer 8

lateral antibrachial n

Question 9

cutaneous innervation of 4th and 5th digits

Answer 9

ulnar n

Question 10

cutaneous innervation of 1 2 3 digits

Answer 10

median n

Question 11

superficial muscles of the anterior compartment

Answer 11

pronator teres
flexor carpi radialis
palmaris longus
flexor carpi ulnaris** (innervated by ulnar n)

Question 12

intermediate muscles of the anterior compartment of the forearm

Answer 12

flexor digitorum superficialis

Question 13

deep muscles of the anterior compartment of the forearm .

Answer 13

flexor digitorum profundus*** (digits 4,5 innervated by ulnar)
flexor pollicis longus
pronator quadratus

Question 14

all muscles of the anterior compartment of the forearm are innervated by ________ n with the exception of what 2 muscles

Answer 14

all are median nerve innervated except
flexor carpi ulnaris
flexor digitorum profundus (to fingers 4,5)
which are innervated by the ulnar n

Question 15

origin/insertion/innervation/action of pronator teres

Answer 15

humeral head/meidal epicondyle –> lateral radius
median n
forearm pronation, weak elbow flexion

Question 16

origin/insertion/innervation/action of flexor carpi radialis m

Answer 16

medial epicondyle –>base of 2nd metacarpal
median n
wrist flexion and abduction
radial deviation of hand

Question 17

abduction of the wrist is performed by

Answer 17

flexor carpi radialis

and flexor pollicis longus

Question 18

origin/insertion/innervation/action of palmaris longus

Answer 18

medial epicondyle –> palmar aponeurosis
Median n
flexion tightens palmar aponeurosis
weak elbow flexion

Question 19

origin/insertion/innervation/action of flexor carpi ulnaris

Answer 19

humeral head-medial epicondyle
ulnar head - olecranon
inserts on pisiform, hook of hamate, base of 5th metacarpal 
ulnar n 
flexion and adduction of hand

Question 20

adduction of the wrist is performed by this muscle

Answer 20

flexor carpi ulnaris m

Question 21

origin/insertion/innervation/action of flexor digitorum superficialis m

Answer 21

humeral-ulnar head: medial epicondyle/cornoid process
radial head: upper anterior border of radius
inserts into sides of middle phalanges of digits 2-5
median n
weak elbow flexion
wrist, MCP, PIP joint flexion at 2-5

Question 22

origin/insertion/innervation/action of flexor digitorum profundus m

Answer 22

ulna and IO membrane to distal phalanges of 2-5 digits
median n (digits 2,3)
ulnar n (digits 4,5)
wrist, MCP, PIP, DIP, of digits 2-5 == flexion

Question 23

origin/insertion/innervation/action of flexor pollicis longus m

Answer 23

radius and IO membrane to distal phalanx of thumb (palmar surface)
median n
wrist flexion and abduction of hand
flexion at carpometacarpal joint of thumb, MCP and IP joints

Question 24

origin/insertion/innervation/action of pronator quadratus

Answer 24

distal quarter of anterior ulna to distal quarter of anterior radius
median n
pronation of hand
stabilizes distal radioulnar joint

Question 25

condition of inflamed tendons of medial epicondyle due to excessive elbow and wrist flexion - painful swelling and pressure on median n

Answer 25

medial epicondylitis tendonitis
golfers/pitchers/bowlers elbow

pronator teres and flexor carpi radialis primarily targeted

Question 26

after the median n crosses the cubital fossa with the brachial artery, it passes between what muscle

Answer 26

median n passes between heads of pronator teres m

bretween humeral head and ulnar head

Question 27

after passing through the heads of pronator teres, the median n runs between what two muscles

Answer 27

flexor digitorum superficialis

flexor digitorum profundus

Question 28

after passing between FDS and FDP, the median nerve runs through what struc

Answer 28

transverse carpal ligament before it enters the palm

Question 29

the anterior interosseous branch of the median n arises where

Answer 29

in the cubital fossa

descends down IO membrane with anterior interosseous artery

Question 30

what structures does the anterior interosseous branch of the median nerve supply

Answer 30

radial part of Flexor Digitorum Profundus

Flexor Pollicis longus and pronator quadratus m

Question 31

where does the ulnar nerve enter the forearm

Answer 31

posterior medial epicondyle by way of the groove for the ulnar n of the humerus

Question 32

the ulnar nerve becomes superficial in the distal forearm before passing between what two structures

Answer 32

transverse carpal ligament and palmar carpal ligament to enter the palm

Question 33

branches of the ulnar artery

Answer 33

ulnar recurrent a (anterior and posterior) 
common interosseous a 
(anterior IO and posterior IO) 
palmar carpal branch artery 
muscular branches

Question 34

branches of the radial a

Answer 34

radial recurrent a
Palmar carpal branch a
muscular branches

Question 35

Anterior interosseous syndrome

Answer 35

branch of median n 
supplies 
Flexor pollicus longus m 
flexor digitorum profundus m (index and middle digits) 
Weakness in pincer movement 

abnormal ok sign

Question 36

hand of benediction is characterized by

Answer 36

dmg to median n

Flexion of PIJ 1-3, DIJ and MPJ of 2,3, lumbricals 1,2 and thenar group ar elost with injury at elbow level

Question 37

Claw hand is characterized by

Answer 37

dmg to distal ulnar n
MPJ hyperextended and IPJ flexed due to unopposed action of extensors and flexor digitorum profundus with injury at wrist level