Forearm

Question 0

What holds the tendons of most of the flexor muscles in place?

Answer 0

palmar carpal ligament and the flexor retinaculum (transverse carpal ligament)

Question 1

What group of muscles are in the anterior part of the forearm?

Answer 1

flexor-pronator muscles

Question 2

What flexor muscles are part of the superficial layer?

Answer 2

pronator teres, flexor carpi radialis, palmar longus, and flexor carpi ulnaris

Question 3

What is the common flexor origin?

Answer 3

medial epicondyle of humerus

Question 4

What flexor muscles are part of the intermediate layer?

Answer 4

flexor digitorum superficialis

Question 5

What flexor muscles are part of the deep layer?

Answer 5

flexor digitorum profundus, flexor pollicis longus, and pronator quadratus

Question 6

Which muscles do not cross the elbow joint?

Answer 6

the three deep flexor muscles; flexor digitorum profundus, flexor pollicis longus, and pronator quadratus

Question 7

What is the prime mover for pronation?

Answer 7

pronator quadratus

Question 8

The ___ flexes the fingers during slow action; this action is reinforced by the ___ when speed and flexion and resistance is required.

Answer 8

FDP; FDS

Question 9

TRUE or FALSE.

Long flexor muscles of the fingers are more efficient when the wrist is flexed.

Answer 9

False

Question 10

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

Answer 10

extensor muscles

Question 11

All extensor muscles are innervated by what nerve?

Answer 11

radial

Question 12

What muscles extend and abduct or adduct the wrist joint?

Answer 12

extensor carpi radialis longus, extensor carpi radialis brevis, and extensor carpi ulnaris

Question 13

What muscles extend the medial four digits?

Answer 13

extensor digitorum, extensor indicis, and extensor digiti minimi

Question 14

What muscles extend or abduct the thumb?

Answer 14

abductor pollicis longus, extensor pollicis brevis, and extensor pollicis longus

Question 15

What does the extensor retinaculum do?

Answer 15

holds the extensor tendons in place; prevents bowstringing of tendons during wrist extension

Question 16

What do synovial tendon sheaths do?

Answer 16

reduce friction for extensor tendons

Question 17

What are the superficial extensors of the forearm?

Answer 17

Brachiradialis, ECRL, ECRB, extensor digitorum, EDM, and ECU

Question 18

What superficial extensors are commonly attached by a common extensor tendon to the lateral epicondyle?

Answer 18

ECRB, extensor digitorum, EDM, and ECU

Question 19

What superficial extensor muscles are attached to the lateral supraepicondylar ridge of the humerus and the adjacent lateral intermuscular septum?

Answer 19

Brachioradialis and ECRL

Question 20

TRUE or FALSE?

No finger can remain fully flexed as the other ones are fully extended.

Answer 20

True

Question 21

What are the deep extensor muscles of the forearm?

Answer 21

APL, EPB, EPL

Question 22

What are the outcropping muscles?

Answer 22

Deep extensor muscles; APL, EPB, EPL, and extensor indicis

Question 23

What are the lateral borders of the snuff box?

Answer 23

The tendons of the APL and the EPB

Question 24

What is the medial border of the snuff box?

Answer 24

Tendon of the EPL

Question 25

What structures are at the floor of the snuff box?

Answer 25

The radial artery, scaphoid, and trapezium

Question 26

What restricts independent extension of the fingers?

Answer 26

Intertendinous connctions

Question 27

What are the major nerves of the forearm?

Answer 27

Median, ulnar, and radial nerves

Question 28

What is the principal nerve of the anterior compartment of the forearm?

Answer 28

Median nerve

Question 29

What is the major branch of the median nerve?

Answer 29

Anterior interosseous nerve

Question 30

What are the main arteries of the forearm?

Answer 30

Ulnar and radial arteries

Question 31

Where can pulsations of the ulnar artery be palpated?

Answer 31

Lateral side of the FCU tendon

Question 32

Where can pulsations of the radial artery be palpated?

Answer 32

Distal radius between the tendons of FCR and APL

Question 33

What is the origin of the anterior interosseous nerve?

Answer 33

median nerve in distal part of cubital fossa

Question 34

What is the origin of the palmar cutaneous branch of median nerve?

Answer 34

median nerve of middle to distal forearm, proximal to flexor retinaculum

Question 35

What is the origin of the palmar cutaneous branch of the ulnar nerve?

Answer 35

ulnar nerve near middle of forearm

Question 36

What is the origin of the dorsal cutaneous branch of ulnar nerve?

Answer 36

ulnar nerve in distal half of forearm

Question 37

What is the origin of the posterior cutaneous nerve of forearm?

Answer 37

radial nerve, as it transverses radial groove of posterior humerus

Question 38

What is the origin of the superficial branch of radial nerve?

Answer 38

sensory terminal branch of radial nerve, in cubital fossa

Question 39

What is the origin of the deep branch of radial/posterior interosseous nerve?

Answer 39

motor terminal branch of radial nerve, in cubital fossa

Question 40

What is the origin of the lateral cutaneous nerve of forearm?

Answer 40

continuation of muscultaneous nerve distal to muscular branches

Question 41

What is the origin of the medial cutaneous nerve of forearm?

Answer 41

medial cord of brachial plexus, receiving C8 and T1 fibers