Anatomy - Forearm

Front 1

what is the name for the membrane between the ulna and radius

Back 1

interosseous membrane

Front 2

what movement does the radioulnar joint support?

Back 2

supination and pronation

Front 3

which structure is responsible for holding the radial head to the ulna?

Back 3

anular ligament

Front 4

the radius articulates with which 2 carpal bones?

Back 4

scaphoid and lunate

Front 5

how does ulna articulate with carpal bones?

Back 5

via articular disc

Front 6

which structures are found on the sides of the wrist joint?

Back 6

radial and ulnar collateral ligaments

Front 7

which ligaments of the wrist are stronger, those of the dorsal or ventral side?

Back 7

ventral side

Front 8

is flexor compartment of forearm anterior or posterior? Extensor compartment?

Back 8

anterior; posterior

Front 9

if pressure in compartments of forearm causes pressure and decreases flow in blood vessels, what is the name for this syndrome?

Back 9

compartment syndrome

Front 10

where do the 'carpi' muscles insert? What is the exception to this? Where does it insert?

Back 10

base of metacarpals; flexor carpi ulnaris which inserts onto pisiform and hammate

Front 11

the digitorum muscles insert where for the most part?

Back 11

onto phalanges

Front 12

how many layers are present in the flexor compartment? How many muscles are present in each layer?

Back 12

3 layers; 4 in superficial, 1 in intermediate, 3 in deep

Front 13

how many layers are present in the extensor compartment? How many muscles are present in each layer?

Back 13

2 layers; 6 in superficial, 5 in deep

Front 14

by which nerve are the muscles of the flexor compartment innervated? What are the exceptions?

Back 14

median nerve; flexor carpi ulnaris and medial aspect of flexor digitorum profundus which are innervated by the ulnar nerve

Front 15

which two muscles of the anterior compartment are innervated by the anterior interosseous branch of the median nerve?

Back 15

flexor pollicis longus and pronator quadratus

Front 16

what are the 4 superficial muscles of the anterior compartment of the forearm? What is the origin for these 4 muscles?

Back 16

pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris; flexor forearm tendon which attaches to medial epicondyle and supracondylar ridge

Hint 16

None

Front 17

flexor carpi ulnaris has an additional origin other than medial epicondyle of humerus. Where is this?

Back 17

ulna

Front 18

what is the muscle of the intermediate layer of the anterior compartment of the forearm? Where are its two origins? Its insertion?

Back 18

flexor digitorum superficialis; common flexor tendon and the radius; middle phalanx of all fingers except thumb

Front 19

what are the 3 muscles of the deep layer of the anterior compartment of the forearm?

Back 19

pronator quadratus, flexor digitorum profundus, flexor pollicis longus

Front 20

where does the flexor digitorum profundus originate? Insert?

Back 20

ulna and interosseous membrane; onto distal phalanx of digits 2-5

Front 21

where does the flexor pollicis longus originate? Insert?

Back 21

radius and interosseous membrane; distal thumb

Front 22

which 2 nerves are primarily responsible for innervating the muscles of the posterior compartment of the forearm?

Back 22

radial nerve and posterior interosseous

Hint 22

None

Front 23

which 3 muscles of the posterior compartment of the forearm are innervated by the radial nerve (before branching)?

Back 23

brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis

Hint 23

None

Front 24

the superficial layer of the posterior compartment of the forearm arises from where?

Back 24

lateral epicondyle of humerus and supracondylar ridge

Front 25

what are the names of the 6 superficial muscles of the extensor compartment of the forearm?

Back 25

brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris

Front 26

what are the names of the 5 deep muscles of the extensor compartment of the forearm?

Back 26

abductor pollicis longus, extensor pollicis longus, extensor pollicis brevis, extensor indicis, supinator

Front 27

into where does the extensor digitorum insert?

Back 27

extensor hood

Front 28

which of the deep muscles of the extensor compartment of the forearm originates from the common tendon?

Back 28

supinator

Front 29

from where do most of the muscles of the deep compartment of the forearm originate (with the exception of the supinator)?

Back 29

radius and ulna

Front 30

does the extensor pollicis brevis originate on the radius or ulna? The extensor pollicis longus? The abductor pollicis longus? The extensor indicis?

Back 30

radius, ulna, ulna and radius, ulna

Hint 30

None

Front 31

the radial artery runs deep to which mucles in forearm?

Back 31

brachioradialis

Front 32

which artery is responsible for the pulse that one can feel on the wrist?

Back 32

radial artery

Front 33

at the wrist, the radial arterty is located just lateral to which tendon?

Back 33

flexor carpi radialis

Front 34

the radial recurrent artery supplies blood to which part of the arm?

Back 34

elbow

Front 35

which muscle of the extensor compartment of the forearm is innervated by the DEEP branch of the radial nerve?

Back 35

supinator

Hint 35

None

Front 36

the radial nerve is accomodated by which structure on the humerus?

Back 36

radial groove

Front 37

which two features of the palm are formed by the radial and ulnar arteries?

Back 37

superficial and deep palmar arches

Front 38

which branch of the radial artery is responsible for the formation of the superficial palmar arch? The deep palmar arch?

Back 38

superficial palmar branch; radial artery

Front 39

what does the palmar carpal branch of the radial artery do?

Back 39

supplies carpal bones with blood

Front 40

what branch of the ulnar artery is responsible for the formation of the superficial palmar arch? The deep palmar arch?

Back 40

ulnar artery; deep palmar branch

Front 41

which vessels which come from superior palmar arch vascularize the digits? From the deep palmar arch?

Back 41

common palmar digital arteries; proper palmar digital arteries

Front 42

the ulnar artery branches to form what? This branch branches into which 2 arteries?

Back 42

common interosseous artery; posterios and anterior interosseous arteries

Front 43

from its branch at the common interosseous artery, what is the destiny of the posterior interosseous artery?

Back 43

crosses the interosseous membrane and supplies blood to extensor compartment

Front 44

which 2 major veins drain blood from the arm? Which is medial? Lateral? Which vein connects the 2 at the cubidal fossa?

Back 44

cephalic and basilic; basilic; cephalic; median cubital

Front 45

what is the name for 2 veins which sandwich an artery? What is the purpose of this?

Back 45

vena committans; countercurrent heat exchange and pumping of blood

Front 46

what are the 3 cutaneous nerves involved in sesation of skin around forearm and hands? From which branches of the brachial plexus does each originate?

Back 46

medial antebrachial cutaneous from medial cord; lateral antebracheal cutaneous from musculocutaneous branch; posterior antebrachial cutaneous from radial branch

Front 47

which nerve has as a branch the anterior interosseous nerve?

Back 47

median nerve

Hint 47

None

Front 48

which 4 muscles are innervated by the median nerve before it forms the anterior interosseous branch? Which 3 are innervated by anterior interosseous branch?

Back 48

pronator teres, flexor digitorum superficialis, palmaris longus, flexor carpi radialis; pronator quadratus, flexor pollicis longus, flexor digitorum profundus

Front 49

sensation for which part of arm/hand is controlled by median antebrachial cutaneous nerve?

Back 49

anterior first 3.5 fingers of hand and corresponding palm, posterior first 3.5 fingers of hand up to PIP joint

Front 50

the lateral cutaneous nerve innervated which part of the skin for the forearm/hand?

Back 50

lateral 1/2 of forearm

Front 51

where does the ulnar nerve branch in the arm?

Back 51

it does not branch in the arm

Front 52

what is the cutaneous innervation of the ulnar nerve?

Back 52

the ulnar 1.5 fingers

Front 53

which two muscles are innervated by the ulnar nerve?

Back 53

flexor carpi ulnaris and flexor digitorum profundus (medial aspect)

Front 54

does the ulnar nerve pass through the carpal tunnel? With which other structure does it pass into wrist?

Back 54

no; ulnar artery

Front 55

which compartment of the forearm is innervared by the radial nerve?

Back 55

extensor

Front 56

the radial nerve directly innervates which 3 muscles?

Back 56

brachioradialis and extensor carpi radialis longus and brevis

Hint 56

None

Front 57

what is the function of the brachialis?

Back 57

flexor of the forearm

Front 58

the deep branch of the radial nerve pierces and innervates which muscle?

Back 58

supinator

Front 59

after the deep radial nerve pierces the supinator, what is it called?

Back 59

the posterior interosseous nerve

Front 60

the axillary nerve innervates which 2 muscles?

Back 60

deltoid and teres minor

Front 61

the superficial radial nerve is cutaneous to which region of the hand?

Back 61

radial dorsum

Front 62

which three tendons are responsible for the anatomical snuffbox? Which artery is found in this structure? Which carpal bone is below?

Back 62

extensor pollicis brevis and extensor pollicis longus and abductor pollicis longus; radial artery; scaphoid

Front 63

what is the action of the pronator teres?

Back 63

pronates and abducts forearm

Front 64

what is the action of flexor carpi radialis?

Back 64

flexes and abducts hand

Front 65

what is the action of the flexor carpi ulnaris?

Back 65

flexes and adducts hand

Front 66

what is the action of the flexor digitorum superficialis?

Back 66

flexes fingers at PIP

Front 67

what is the action of the flexor digitorum profundus?

Back 67

flexes fingers at DIP

Front 68

what is the action of the flexor pollicis longus?

Back 68

flexes thumb at IP

Front 69

what is the action of the extensor carpi radialis longus and brevis?

Back 69

extends and abducts hand

Front 70

what is the action of the extensor digitorum?

Back 70

extends at PIP

Front 71

what is the action of the extensor digiti minimi?

Back 71

extends pinky

Front 72

what is the action of the extensor carpi ulnaris?

Back 72

extends and adducts hand

Front 73

what is the action of the supinator?

Back 73

supinates forearm