Forearm

Question 1

What are the bones of the forearm?

Answer 1

ulna and radius

Question 2

What are the main joints of the forearm

Answer 2

elbow and wrist

Question 3

Where do the radius and ulna also articulate with one another?

Answer 3

at the proximal and distal radio-ulnar joint

Question 4

What bones compose the elbow joint?

Answer 4

proximal radius, proximal ulna and distal humerus

Question 5

What is the function of the elbow joint?

Answer 5

flexion and extension of the forearm

Question 6

Where on the elbow joint is the radical collateral ligament?

Answer 6

lateral side of the elbow joint

Question 7

Where on the elbow joint is the ulnar collateral ligament?

Answer 7

medial side of the elbow joint

Question 8

What elbow ligament is easily injured in children by sudden pull on an extended arm?

Answer 8

annular ligament

Question 9

Where on the elbow joint is the annular ligament?

Answer 9

encircles and stabilize date head of the rations in relation to the ulna

Question 10

Where is the wrist/radiocarpal joint?

Answer 10

articulation between the distal radius and the proximal row of carpal bones (scaphoid, lunate and triquetrum)

Question 11

What does the radoiocarpal articulation allow for?

Answer 11

flexion, extension, abduction an adduction fo the hand

Question 12

What doe the proximal and distal radioulnar joints allow for?

Answer 12

pronation and supination fo the forearm and hand.
supination radius and ulna parallel
pronation radius rotates over ulna

Question 13

What are the 2 compartments of the forearm?

Answer 13

anterior and posterior

Question 14

What separates the 2 compartments of the forearm?

Answer 14

interosseous membrane between the radius sand ulna and the medical and lateral intermusclar septum

Question 15

What do the muscles of the anterior compartment of the forearm do?

Answer 15

flex the wrist and digits, pronate the hand, flex the thumb and abduct and adduct the hand (lateral and medical deviation or radial and ulnar deviation)

Question 16

What are the innervations of the anterior compartment of the forearm?

Answer 16

All are innervated by the median nerve EXCEPT for 2 muscles flexor carpi ulnas and the ulnar/medial half of flexor digitorum profundus that are innervated by the ulnar nerve.

Question 17

where does the blood supply of the anterior compartment of the forearm come from?

Answer 17

branches of the radial and ulnar arteries

Question 18

What do the muscles of the posterior compartment of the forearm do?

Answer 18

extend the wrist and digits, supinate the hand and extend and abduct the thumb

Question 19

What are the innervation(s) of the posterior compartment of the forearm?

Answer 19

radial nerve

Question 20

where does the blood supply of the posterior compartment of the forearm come from?

Answer 20

branches of the radial and ulnar arteries

Question 21

What are the muscles in the anterior compartment of the forearm?

Answer 21

pronator teres, flexor carpi radialis, flexor carpi ulnaris, palmares longus, flexor digitorum superficialis, flexor digitorium profundus, pronator quadratus

Question 22

What are the muscles in the posterior compartment of the forearm?

Answer 22

extensor carpi ulnas, extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor indicis, abductor pollicis longus, extensor pollicis longus, extensor pollicis brevis, supinator, brachioradialis

Question 23

what is the movement of the carpometacarpal joints?

Answer 23

relatively immoveable

Question 24

what is the movement of the metacarpophalangeal joints?

Answer 24

flexion and extension and abduction and adduction of the digits

Question 25

interphalangeal joint

Answer 25

only one at the thumb. allow for flexion and extension of the middle and distal phalanx

Question 26

what is the additional movement of the thumb?

Answer 26

opposition (thumb to pinki)

Question 27

what are intrinsic muscles of the hand?

Answer 27

has both of its attachments in the hand

Question 28

what are extrinsic muscles of the hand?

Answer 28

has one of its attachments outside the hand in the forearm

Question 29

What are the superficial muscles of the hand?

Answer 29

3 muscles that form the thenar pad, 3 muscles that form the hypothenar pad, lumbricals and adductor pollicis

Question 30

What is the innervation or the superficial muscles of the hand?

Answer 30

all innervated by the ulnar nerve EXCEPT the lateral 2 lumbricals and 3 thenar muscles they are innervated by the median nerve.

Question 31

What are the deep muscles of the hand?

Answer 31

palmar interossei (3) and Doral interossei (4)

Question 32

What doe the deep muscles of the hand do?

Answer 32

adduct and abduct the fingers respectively

Question 33

What is the innervation or the deep muscles of the hand?

Answer 33

ulnar nerve and blood supply by radial and ulnar arteries via the superficial and deep palmar arch

Question 34

Abductor pollicis brevis

Answer 34

superficial, abducts thumb, median nerve

Question 35

flexor pollicis brevis

Answer 35

superficial, flex thumb, median nerve

Question 36

opponens polliciis

Answer 36

superficial, flexes MP joint, extends IP joints, median nerve

Question 37

abductor digiti minimi

Answer 37

superficial, abducts little finger, ulnar nerve

Question 38

flexor digiti minimi

Answer 38

superficial, flexes little finger, ulnar nerve

Question 39

opponens digiti minimi

Answer 39

superficial opposes little finger, ulnar nerve

Question 40

Lumbricals 93-4 (medial)

Answer 40

superficial, flexes MP joint, extends IP joints, ulnar nerve

Question 41

adductor pollicis

Answer 41

superficial, adducts thumb, ulnar nerve

Question 42

Palmar interossei

Answer 42

deep, adduct fingers, flexes MP joints extends IP joints, ulnar nerve

Question 43

Dorsal interossei

Answer 43

deep, abduct fingers, flexes MP and extends IP joints, ulnar nerve