Deck 7: The Wrist and Hand Joints

Question 1

A gamekeeper's or skier's thumb is a common injury that involves a sprain of the ___________ of the thumb metacarpophalangeal joint and may require surgery when severely sprained.

A)palmar carpometacarpal ligament
B)palmar metacarpal ligament
C)radial collateral ligament
D)ulnar collateral ligament

Answer 1

ulnar collateral ligament

Question 2

Which of the following is the origin of the flexor carpi radialis muscle?

A)Medial epicondyle of the humerus
B)Middle anterior surface of the radius
C)Posterior aspect of the proximal ulna
D)Proximal three-fourths of the anterior and medial ulna

Answer 2

Medial epicondyle of the humerus

Question 3

In addition to direct contusions on the ulnar nerve at the posteromedial elbow leading to symptoms, the ulnar nerve may develop symptoms from which of the following?

A)Chronic contusions or pressure over ulnar nerve area
B)The ulnar nerve Subluxing or slipping out of its grooves
C)Traction injury to this nerve with the medial stress placed on the elbow during pitching or in conjunction with an ulnar collateral ligament sprain
D)All of the above

Answer 3

All of the above

Question 4

Which of the following is the origin of the flexor digitorum profundus muscle?

A)Medial epicondyle of the humerus
B)Middle anterior surface of the radius
C)Posterior aspect of the proximal ulna
D)Proximal three-fourths of the anterior and medial ulna

Question 5

The anterior interosseous nerve that branches from the median nerve innervates the:

A)extensor digitorum muscle.
B)extensor indicis muscle.
C)flexor carpi ulnaris muscle.
D)flexor pollicis longus muscle.

Question 6

Which of the following is the insertion of the extensor carpi ulnaris muscle?

A)The base of the distal phalanges of the four fingers
B)The base of the fifth metacarpal on the dorsal surface
C)The base of the second metacarpal on the dorsal surface
D)The base of the third metacarpal on the dorsal surface

Question 7

Which of the following is the insertion of the extensor carpi radialis brevis muscle?

A)The base of the distal phalanges of the four fingers
B)The base of the fifth metacarpal on the dorsal surface
C)The base of the second metacarpal on the dorsal surface
D)The base of the third metacarpal on the dorsal surface

Question 8

Which of the following is the insertion of the extensor carpi radialis longus muscle?

A)The base of the distal phalanges of the four fingers
B)The base of the fifth metacarpal on the dorsal surface
C)The base of the second metacarpal on the dorsal surface
D)The base of the third metacarpal on the dorsal surface

Question 9

Which of the following is the insertion of the flexor digitorum profundus muscle?

A)The base of the distal phalanxes of the four fingers
B)The base of the fifth metacarpal on the dorsal surface
C)The base of the second metacarpal on the dorsal surface
D)The base of the third metacarpal on the dorsal surface

Question 10

Which of the following muscles performs adduction of the wrist?

A)The extensor carpi radialis longus muscle
B)The flexor carpi ulnaris muscle
C)The flexor pollicis longus muscle
D)The palmaris longus muscle

Question 11

Which of the following muscles performs abduction of the wrist?

A)The extensor carpi radialis longus muscle
B)The extensor digitorum muscle
C)The flexor carpi ulnaris muscle
D)The palmaris longus muscle

Question 12

Which of the following muscles performs flexion of the thumb?

A)The extensor carpi radialis longus muscle
B)The flexor carpi ulnaris muscle
C)The flexor pollicis longus muscle
D)The palmaris longus muscle

Question 13

Which of these muscles may be palpated just proximal to the dorsal aspect of the wrist and approximately 1 cm medial to the radial styloid?

A)The extensor carpi radialis longus muscle
B)The flexor carpi ulnaris muscle
C)The flexor pollicis longus muscle
D)The palmaris longus muscle

Question 14

Which of the following muscles originates on the lateral epicondyle of the humerus?

A)The abductor pollicis longus muscle
B)The extensor digitorum muscle
C)The extensor indicis muscle
D)The extensor pollicis longus muscle

Question 15

Which of the following muscles inserts on the four tendons to bases of middle and distal phalanxes of the four fingers on the dorsal surface?

A)The abductor pollicis longus muscle
B)The extensor digitorum muscle
C)The extensor indicis muscle
D)The extensor pollicis longus muscle

Question 16

Which of the following muscles performs extension of the index finger at the metacarpophalangeal joint?

A)The abductor pollicis longus muscle
B)The extensor digiti minimi muscle
C)The extensor indicis muscle
D)The extensor pollicis longus muscle

Question 17

Which of the following is the pointing muscle that originates between middle and distal one-third of the posterior ulna?

A)The abductor pollicis longus muscle
B)The extensor digitorum muscle
C)The extensor indicis muscle
D)The palmaris longus muscle

Question 18

Which of the following is the primary function of the extensor digiti minimi muscle?

A)Extension of the index finger at the metacarpophalangeal joint
B)Extension of the little finger at the metacarpophalangeal joint
C)Flexion of the index finger
D)Flexion of the thumb

Question 19

Which of the following is the primary function of the extensor pollicis longus muscle?

A)Extension of the little finger
B)Extension of the thumb
C)Flexion of the index finger
D)Flexion of the thumb

Question 20

When using the flexor digitorum profundus and flexor digitorum superficialis to tightly grip an object with the fingers, which of the following muscles assist in this effort by stabilizing the wrist?

A)The abductor pollicis longus, extensor pollicis longus and extensor pollicis brevis
B)The extensor digitorum, the extensor indicis, and the extensor digiti minimi
C)The extensor carpi radialis longus, extensor carpi radialis brevis, and extensor carpi ulnaris
D)The flexor carpi ulnaris, palmaris longus, and flexor carpi radialis

Question 21

Essentially all of the wrist and finger extensors are innervated by the:

A)musculocutaneous nerve.
B)median nerve.
C)radial nerve.
D)ulnar nerve.

Question 22

Which of the following muscles performs actions in the frontal plane about the sagittal axis?

A)The abductor pollicis longus muscle
B)The extensor digitorum muscle
C)The extensor indicis muscle
D)The extensor pollicis longus muscle

Question 23

Which of the following muscles may not be palpated on the dorsal aspect of the hand?

A)The abductor pollicis longus muscle
B)The extensor digitorum muscle
C)The extensor indicis muscle
D)The extensor pollicis longus muscle

Question 24

Disruption of a tendon at or near the insertion of the ________ is known as a jersey or sweater finger and should be addressed surgically within approximately one week.

A)extensor digitorum muscle
B)extensor indicis muscle
C)flexor digitorum profundus muscle
D)flexor digitorum superficialis muscle

Question 25

Which of the following is the only muscle that flexes the finger distal interphalangeal joint (DIP) joints?

A)The flexor carpi radialis muscle
B)The flexor carpi ulnaris muscle
C)The flexor digitorum profundus muscle
D)The flexor digitorum superficialis muscle

Question 26

Each finger has three interphalangeal joints, whereas the thumb has only two.

Question 27

Movements of the wrist joint include flexion, extension, abduction, and adduction.

Question 28

The fingers can only flex and extend, except at the metacarpophalangeal joints, where abduction and adduction are controlled by the intrinsic hand muscles.

Question 29

In the context of wrist and hand movements, dorsiflexion refers to the movement of the back of the hand toward the posterior or dorsal aspect of the forearm.

Question 30

In the context of wrist and hand movements, radial flexion refers to the movement of the thumb side of the hand toward the medial aspect or radial side of the forearm.

Question 31

In the context of wrist and hand movements, ulnar flexion refers to the movement of the little finger side of the hand toward the medial aspect or ulnar side of the forearm.

Question 32

In the context of wrist and hand movements, opposition refers to the movement of the thumb across the palmar aspect to oppose the palm or any combination of the phalanges.

Question 33

The three wrist flexors, from medial to lateral, are the flexor carpi ulnaris, palmaris longus, and flexor carpi radialis.

Question 34

The extensors of the wrist include, from lateral to medial, are the extensor carpi radialis longus, extensor carpi radialis brevis, and extensor carpi radialis.

Question 35

The wrist flexor muscles have their origin on the medial epicondyle of the humerus.

Question 36

Carpal tunnel syndrome is a condition in which there is an increased pressure in the carpal tunnel, which interferes with the normal function of the median nerve.

Question 37

All of the flexor tendons except for the flexor carpi ulnaris and palmaris longus pass through the carpal tunnel, along with the median nerve.

Question 38

The human wrist and hand have more than 30 muscles, of which 11 are intrinsic muscles.

Question 39

The muscles of the wrist and hand are all innervated from the radial and median nerves and their respective branches.

Question 40

The flexor digitorum superficialis and the flexor digitorum profundus are finger flexors, and the flexor pollicis longus is a thumb flexor.

Question 41

The extensor digiti minimi muscle is innervated by the radial nerve, posterior interosseous branch (C6-C8).

Question 42

The flexor pollicis longus muscle inserts on the base of the distal phalanx of the thumb on the palmar surface.

Question 43

The ulnar nerve provides sensation to the ulnar side of the hand, the ulnar half of the ring finger, and the entire little finger.

Question 44

The extensor carpi radialis longus muscle can perform weak extension of the elbow during a concentric contraction.

Question 45

The flexor digitorum superficialis muscle performs its action in the frontal plane.

Question 46

The flexor pollicis longus muscle may be palpated on the posterior surface of the thumb.

Question 47

To stretch the flexor carpi ulnaris, the elbow must be fully extended with the forearm supinated while a partner passively extends and abducts the wrist.

Question 48

The extensor carpi ulnaris muscle and the flexor carpi ulnaris muscle are the only muscles involved in ulnar deviation.

Question 49

Hitting the "funny bone" and experiencing a painful tingling sensation is actually a contusion to the ulnar nerve.

Question 50

The extensor digitorum muscle, also known as the extensor digitorum communis, is the only muscle involved in extension of all four fingers.