Deck 8: Extrinsic Muscles of the Finger Joints

Question 1

Which are the attachments of the abductor pollicis longus?

A)posterior radius and ulna to the thumb
B)middle anterior fibula to the dorsal surface of the big toe (toe number one)
C)middle anterior fibula to the lateral surface of the big toe (toe number one)
D)anterior radius and ulna to the thumb

Answer 1

A

Question 2

Which is an action of the flexor digitorum superficialis?

A)extension of fingers two through five at the metacarpophalangeal and proximal interphalangeal joints
B)flexion of the arm at the glenohumeral joint
C)extension of the forearm at the elbow joint
D)flexion of the hand at the wrist joint

Answer 2

D

Question 3

Which muscles attach onto the lateral epicondyle of the humerus (via the common extensor tendon)?

A)flexor digitorum superficialis and flexor digitorum profundus
B)flexor digitorum superficialis and extensor digitorum
C)extensor digitorum and extensor digiti minimi
D)extensor digiti minimi and flexor digitorum profundus

Answer 3

C

Question 4

Which are the attachments of the flexor digitorum superficialis?

A)medial epicondyle of the humerus (via the common flexor tendon)and the anterior ulna and radius to the anterior surfaces of fingers two through five
B)lateral epicondyle of the humerus (via the common extensor tendon)and the posterior ulna and radius to the posterior surfaces of fingers two through five
C)lateral supracondylar ridge of the humerus to the anterior surfaces of fingers two through five
D)medial epicondyle of the humerus (via the common flexor tendon)and the lateral epicondyle of the humerus (via the common extensor tendon)to the anterior surfaces of fingers two through five

Question 5

Which is an action of the flexor digitorum profundus?

A)flexion of the forearm at the elbow joint
B)flexion of the arm at the glenohumeral joint
C)extension of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints
D)flexion of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints

Question 6

Which is an action of the flexor digitorum profundus?

A)flexion of the hand at the wrist joint
B)flexion of the arm at the glenohumeral joint
C)flexion of the forearm at the elbow joint
D)extension of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints

Question 7

Which are the attachments of the extensor pollicis longus?

A)posterior ulna to the thumb
B)lateral epicondyle of the humerus (via the common extensor tendon)to the thumb
C)medial epicondyle of the humerus (via the common extensor tendon)to the thumb
D)anterior ulna to the thumb

Question 8

Which are the attachments of the extensor pollicis brevis?

A)anterior radius to the thumb
B)posterior radius to the thumb
C)posterior ulna to the thumb
D)lateral epicondyle of the humerus (via the common extensor tendon)to the thumb

Question 9

Which are the attachments of the flexor digitorum profundus?

A)anterior radius to the anterior surfaces of fingers two through five
B)middle posterior tibia to the plantar surface of toes two through five
C)medial and anterior ulna to the anterior surfaces of fingers two through five
D)distal posterior fibula to the plantar surface of toes two through five

Question 10

Which are the attachments of the flexor pollicis longus?

A)distal posterior fibula to the plantar surface of the big toe (toe number one)
B)anterior surface of the radius to the thumb
C)lateral epicondyle of the humerus (via the common flexor tendon)to the posterior surface of the thumb
D)anterior surface of the ulna to the thumb

Question 11

Which is an action of the flexor pollicis longus?

A)extension of the forearm at the elbow joint
B)flexion of the thumb at the carpometacarpal,metacarpophalangeal,and interphalangeal joints
C)extension of the arm at the glenohumeral joint
D)flexion of the arm at the glenohumeral joint

Question 12

Which are the attachments of the extensor indicis?

A)anterior ulna to the index finger (finger number two)
B)posterior radius to the index finger (finger number two)
C)posterior ulna to the index finger (finger number two)
D)anterior radius and ulna to the index finger (finger number two)

Question 13

Which is an action of the flexor pollicis longus?

A)extension of the thumb at the carpometacarpal,metacarpophalangeal,and interphalangeal joints
B)extension of the hand at the wrist joint
C)flexion of the hand at the wrist joint
D)extension of the arm at the glenohumeral joint

Question 14

Which are the attachments of the extensor digiti minimi?

A)lateral epicondyle of the humerus (via the common extensor tendon)to the phalanges of fingers two through five
B)lateral epicondyle of the humerus (via the common extensor tendon)to the phalanx of the little finger (finger number five)
C)medial epicondyle of the humerus (via the common extensor tendon)to the phalanx of the little finger (finger number five)
D)dorsal surface of the calcaneus to the dorsal surface of the phalanx of the little toe (toe number five)

Question 15

If a muscle crosses the metacarpophalangeal and interphalangeal joints of fingers two through five on the dorsal (posterior)side with a vertical orientation to its fibers,what will its action most likely be?

A)flexion of the fingers at these joints
B)extension of the fingers at these joints
C)abduction of the fingers at these joints
D)adduction of the fingers at these joints

Question 16

Which are the attachments of the extensor digitorum?

A)posterior radius and ulna to the lateral epicondyle of the humerus (via the common extensor tendon)to the phalanges of fingers two through five
B)lateral epicondyle of the humerus (via the common extensor tendon)to the phalanges of fingers two through five
C)lateral epicondyle of the humerus (via the common extensor tendon)to the phalanges of fingers one through five
D)medial epicondyle of the humerus (via the common flexor tendon)to the phalanges of fingers two through five

Question 17

Which is an action of the flexor digitorum superficialis?

A)extension of fingers two through five at the metacarpophalangeal and proximal interphalangeal joints
B)flexion of fingers two through five at the metacarpophalangeal and proximal interphalangeal joints
C)extension of the forearm at the elbow joint
D)flexion of the arm at the glenohumeral joint

Question 18

If a muscle crosses the metacarpophalangeal and interphalangeal joints of fingers two through five on the palmar (anterior)side with a vertical orientation to its fibers,what will its action most likely be?

A)flexion of the fingers at these joints
B)extension of the fingers at these joints
C)abduction of the fingers at these joints
D)adduction of the fingers at these joints

Question 19

Which muscles attach onto the thumb?

A)extensor digiti minimi and extensor pollicis longus
B)extensor indicis and extensor pollicis brevis
C)abductor pollicis longus and extensor pollicis brevis
D)flexor digitorum superficialis and extensor digiti minimi

Question 20

Which is an action of the extensor digitorum?

A)flexion of the hand at the wrist joint
B)flexion of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints
C)flexion of the arm at the glenohumeral joint
D)extension of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints

Question 21

Which is an eccentric function of the extensor digitorum?

A)restrains/slows flexion of the hand at the wrist joint
B)restrains/slows extension of the hand at the wrist joint
C)restrains/slows extension of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints
D)restrains/slows elevation of the scapula at the scapulocostal joint

Question 22

If a muscle crosses the metacarpophalangeal and interphalangeal joints of fingers two through five on the palmar (anterior)side with a vertical orientation to its fibers,what will its eccentric function most likely be?

A)restrains/slows flexion of the fingers at these joints
B)restrains/slows extension of the fingers at these joints
C)restrains/slows abduction of the fingers at these joints
D)restrains/slows adduction of the fingers at these joints

Question 23

Which difference between the flexor digitorum superficialis and the flexor digitorum profundus is true?

A)the flexor digitorum superficialis can flex the fingers at the distal interphalangeal joint;the flexor digitorum profundus cannot
B)the flexor digitorum profundus can flex the forearm at the elbow joint;the flexor digitorum superficialis cannot
C)the flexor digitorum superficialis can only flex fingers two through four;the flexor digitorum profundus can flex fingers two through five
D)the flexor digitorum profundus can flex the fingers at the distal interphalangeal joint;the flexor digitorum superficialis cannot

Question 24

Which are actions of the flexor digitorum profundus?

A)flexion of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints and extension of the hand at the wrist joint
B)flexion of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints and flexion of the hand at the wrist joint
C)extension of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints and flexion of the hand at the wrist joint
D)flexion of the forearm at the elbow joint and flexion of the hand at the wrist joint

Question 25

Which is an eccentric function of the flexor digitorum profundus?

A)restrains/slows extension of the forearm at the elbow joint
B)restrains/slows flexion of the arm at the glenohumeral joint
C)restrains/slows flexion of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints
D)restrains/slows extension of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints

Question 26

Which is an action of the extensor digiti minimi?

A)extension of the little finger (finger number five)at the metacarpophalangeal and proximal and distal interphalangeal joints
B)flexion of the little finger (finger number five)at the metacarpophalangeal and proximal and distal interphalangeal joints
C)flexion of the hand at the wrist joint
D)flexion of the thumb at the carpometacarpal,metacarpophalangeal,and interphalangeal joints

Question 27

Which is an action of the extensor digitorum?

A)flexion of the hand at the wrist joint
B)extension of the hand at the wrist joint
C)flexion of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints
D)elevation of the scapula at the scapulocostal joint

Question 28

Which is an eccentric function of the flexor pollicis longus?

A)restrains/slows flexion of the forearm at the elbow joint
B)restrains/slows flexion of the thumb at the carpometacarpal,metacarpophalangeal,and interphalangeal joints
C)restrains/slows extension of the arm at the glenohumeral joint
D)restrains/slows extension of the thumb at the carpometacarpal,metacarpophalangeal,and interphalangeal joints

Question 29

Which is an action of the extensor indicis?

A)ulnar deviation (adduction)of the hand at the wrist joint
B)extension of the little finger (finger number five)at the metacarpophalangeal and proximal and distal interphalangeal joints
C)flexion of the index finger (finger number two)at the metacarpophalangeal and proximal and distal interphalangeal joints
D)extension of the index finger (finger number two)at the metacarpophalangeal and proximal and distal interphalangeal joints

Question 30

Which is an action of the extensor indicis?

A)extension of the hand at the wrist joint
B)flexion of the hand at the wrist joint
C)ulnar deviation (adduction)of the hand at the wrist joint
D)extension of the forearm at the elbow joint

Question 31

Which is an action of the extensor pollicis brevis?

A)flexion of the thumb at the carpometacarpal and metacarpophalangeal joints
B)extension of the thumb at the carpometacarpal and metacarpophalangeal joints
C)flexion of the hand at the wrist joint
D)flexion of the forearm at the elbow joint

Question 32

Which is an eccentric function of the flexor digitorum superficialis?

A)restrains/slows flexion of fingers two through five at the metacarpophalangeal and proximal interphalangeal joints
B)restrains/slows flexion of the hand at the wrist joint
C)restrains/slows flexion of the forearm at the elbow joint
D)restrains/slows extension of the hand at the wrist joint

Question 33

Which is an eccentric function of the flexor digitorum superficialis?

A)restrains/slows extension of fingers two through five at the metacarpophalangeal and proximal interphalangeal joints
B)restrains/slows flexion of fingers two through five at the metacarpophalangeal and proximal interphalangeal joints
C)restrains/slows flexion of the forearm at the elbow joint
D)restrains/slows extension of the arm at the glenohumeral joint

Question 34

If a muscle crosses the metacarpophalangeal and interphalangeal joints of fingers two through five on the dorsal (posterior)side with a vertical orientation to its fibers,what will its eccentric function most likely be?

A)restrains/slows flexion of the fingers at these joints
B)restrains/slows extension of the fingers at these joints
C)restrains/slows abduction of the fingers at these joints
D)restrains/slows adduction of the fingers at these joints

Question 35

Which is an action of the extensor pollicis longus?

A)flexion of the thumb at the carpometacarpal,metacarpophalangeal,and interphalangeal joints
B)flexion of the hand at the wrist joint
C)extension of the thumb at the carpometacarpal,metacarpophalangeal,and interphalangeal joints
D)ulnar deviation (adduction)of the hand at the wrist joint

Question 36

Which are actions of the extensor digitorum?

A)flexion of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints and extension of the hand at the wrist joint
B)extension of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints and radial deviation (abduction)of the hand at the wrist joint
C)flexion of the forearm at the elbow joint and flexion of the hand at the wrist joint
D)extension of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints and extension of the hand at the wrist joint

Question 37

Which is an action of the abductor pollicis longus?

A)abduction of the thumb at the carpometacarpal joint
B)adduction of the thumb at the carpometacarpal joint
C)flexion of the thumb at the carpometacarpal joint
D)flexion of the hand at the wrist joint

Question 38

Which muscle(s)can radially deviate (abduct)the hand at the wrist joint?

A)abductor pollicis longus
B)extensor pollicis brevis
C)extensor pollicis longus
D)all of the above

Question 39

Which are actions of the flexor digitorum superficialis?

A)extension of fingers two through five at the metacarpophalangeal and proximal interphalangeal joints and flexion of the hand at the wrist joint
B)flexion of fingers two through five at the metacarpophalangeal and proximal interphalangeal joints and extension of the hand at the wrist joint
C)flexion of the thumb at the carpometacarpal,metacarpophalangeal,and interphalangeal joints and flexion of the hand at the wrist joint
D)flexion of fingers two through five at the metacarpophalangeal and proximal interphalangeal joints and flexion of the hand at the wrist joint

Question 40

Which is an eccentric function of the extensor digitorum?

A)restrains/slows extension of the hand at the wrist joint
B)restrains/slows flexion of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints
C)restrains/slows flexion of the arm at the glenohumeral joint
D)restrains/slows extension of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints

Question 41

The flexor digitorum superficialis arises proximally from the medial epicondyle of the humerus as a part of what structure?

A)common flexor tendon
B)bicipital aponeurosis
C)common extensor tendon
D)joint capsule of the elbow joint

Question 42

Which is an eccentric function of the extensor digiti minimi?

A)restrains/slows extension of the little finger (finger number five)at the metacarpophalangeal and proximal and distal interphalangeal joints
B)restrains/slows flexion of the little finger (finger number five)at the metacarpophalangeal and proximal and distal interphalangeal joints
C)restrains/slows extension of the hand at the wrist joint
D)restrains/slows flexion of the thumb at the carpometacarpal,metacarpophalangeal,and interphalangeal joints

Question 43

What nerve innervates the flexor digitorum superficialis?

A)median nerve
B)axillary nerve
C)radial nerve
D)ulnar nerve

Question 44

What nerve innervates the extensor digitorum?

A)median nerve
B)axillary nerve
C)radial nerve
D)ulnar nerve

Question 45

What nerve innervates the extensor digiti minimi?

A)median nerve
B)axillary nerve
C)radial nerve
D)ulnar nerve

Question 46

What nerve innervates the extensor pollicis longus?

A)median nerve
B)axillary nerve
C)radial nerve
D)ulnar nerve

Question 47

Which are eccentric functions of the extensor digitorum?

A)restrains/slows flexion of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints and extension of the hand at the wrist joint
B)restrains/slows extension of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints and radial deviation (abduction)of the hand at the wrist joint
C)restrains/slows extension of the forearm at the elbow joint and extension of the hand at the wrist joint
D)restrains/slows flexion of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints and flexion of the hand at the wrist joint

Question 48

What nerve(s)innervates the flexor digitorum profundus?

A)median nerve
B)ulnar nerve
C)axillary nerve
D)a and b

Question 49

Which is an eccentric function of the abductor pollicis longus?

A)restrains/slows abduction of the thumb at the carpometacarpal joint
B)restrains/slows adduction of the thumb at the carpometacarpal joint
C)restrains/slows extension of the thumb at the carpometacarpal joint
D)restrains/slows radial deviation (abduction)of the hand at the wrist joint

Question 50

The muscles of the anterior forearm are usually innervated by what nerve?

A)median nerve
B)axillary nerve
C)radial nerve
D)ulnar nerve

Question 51

What nerve innervates the extensor indicis?

A)median nerve
B)axillary nerve
C)radial nerve
D)ulnar nerve

Question 52

What nerve innervates the abductor pollicis longus?

A)median nerve
B)axillary nerve
C)radial nerve
D)ulnar nerve

Question 53

Which is an eccentric function of the extensor pollicis brevis?

A)restrains/slows flexion of the thumb at the carpometacarpal and metacarpophalangeal joints
B)restrains/slows extension of the thumb at the carpometacarpal and metacarpophalangeal joints
C)restrains/slows radial deviation (abduction)of the hand at the wrist joint
D)restrains/slows flexion of the forearm at the elbow joint

Question 54

What nerve innervates the flexor pollicis longus?

A)median nerve
B)axillary nerve
C)radial nerve
D)ulnar nerve

Question 55

What is the only muscle that can flex the distal phalanx of fingers two through five?

A)flexor digitorum superficialis
B)flexor digitorum profundus
C)flexor digitorum longus
D)flexor digitorum brevis

Question 56

Which are eccentric functions of the flexor digitorum superficialis?

A)restrains/slows extension of fingers two through five at the metacarpophalangeal and proximal interphalangeal joints and extension of the hand at the wrist joint
B)restrains/slows flexion of fingers two through five at the metacarpophalangeal and proximal interphalangeal joints and flexion of the hand at the wrist joint
C)restrains/slows flexion of the thumb at the carpometacarpal,metacarpophalangeal,and interphalangeal joints and flexion of the hand at the wrist joint
D)restrains/slows flexion of fingers two through five at the metacarpophalangeal and proximal interphalangeal joints and extension of the hand at the wrist joint

Question 57

What nerve innervates the extensor pollicis brevis?

A)median nerve
B)axillary nerve
C)radial nerve
D)ulnar nerve

Question 58

Which is an eccentric function of the extensor indicis?

A)restrains/slows extension of the hand at the wrist joint
B)restrains/slows flexion of the little finger (finger number five)at the metacarpophalangeal and proximal and distal interphalangeal joints
C)restrains/slows flexion of the index finger (finger number two)at the metacarpophalangeal and proximal and distal interphalangeal joints
D)restrains/slows extension of the index finger (finger number two)at the metacarpophalangeal and proximal and distal interphalangeal joints

Question 59

The muscles of the posterior forearm are usually innervated by what nerve?

A)median nerve
B)axillary nerve
C)radial nerve
D)ulnar nerve

Question 60

What nerve innervates the "deep distal four group" of muscles?

A)median nerve
B)axillary nerve
C)radial nerve
D)ulnar nerve

Question 61

Irritation and inflammation of the lateral epicondyle of the humerus and/or the common extensor tendon is usually called

A)lateral epicondylitis,lateral epicondylosis,or tennis elbow.
B)lateral epicondylitis,lateral epicondylosis,or golfer's elbow.
C)medial epicondylitis,medial epicondylosis,or pitcher's shoulder.
D)medial epicondylitis,medial epicondylosis,or golfer's elbow.

Question 62

What three muscles border the anatomic snuffbox?

A)abductor pollicis longus,extensor pollicis brevis,and extensor pollicis longus
B)abductor pollicis longus,extensor pollicis longus,and flexor digitorum superficialis
C)extensor carpi radialis longus,extensor carpi radialis brevis,and extensor pollicis brevis
D)flexor carpi radialis,palmaris longus,and flexor carpi ulnaris

Question 63

Why do wrist extensor muscles contract when a person flexes his or her fingers to make a fist?

A)they contract as fixators (stabilizers)to prevent the hand from flexing at the wrist joint
B)they contract as fixators (stabilizers)to prevent the hand from extending at the wrist joint
C)they contract as antagonists to prevent the fingers from extending
D)they contract as antagonists to prevent the fingers from flexing

Question 64

Where does the dorsal digital expansion attach?

A)proximal and distal phalanges of fingers two through five
B)proximal and middle phalanges of fingers two through five
C)middle and distal phalanges of fingers two through five
D)proximal phalanges of fingers two through five only

Question 65

The distal attachments of what muscle spread out to become the dorsal digital expansion of fingers two through five of the hand?

A)flexor digitorum superficialis
B)flexor digitorum profundus
C)extensor carpi radialis longus
D)extensor digitorum

Question 66

De Quervain's disease is caused by excessive friction between the tendons of the abductor pollicis longus and/or the extensor pollicis brevis and what bony structure?

A)carpal tunnel
B)supinator crest of the ulna
C)radial styloid
D)ulnar styloid

Question 67

The extensor digitorum communis is another name for what muscle?

A)extensor digitorum
B)extensor digiti minimi
C)extensor indicis
D)flexor digitorum superficialis

Question 68

The extensor digiti minimi sometimes blends with what muscle?

A)extensor carpi radialis brevis
B)brachioradialis
C)flexor digitorum profundus
D)extensor digitorum

Question 69

Which one of the following is true?

A)the tendons of the flexor digitorum profundus split to allow passage of the tendons of the flexor digitorum superficialis to the distal phalanges of fingers two through five
B)the tendons of the extensor digitorum split to allow passage of the tendons of the flexor digitorum profundus to the distal phalanges of fingers two through five
C)the tendons of the flexor digitorum superficialis split to allow passage of the tendons of the flexor digitorum profundus to the distal phalanges of fingers two through five
D)the tendons of the flexor digitorum superficialis split to allow passage of the tendons of the extensor digitorum to the distal phalanges of fingers two through five

Question 70

What nerve runs between the two heads of the flexor digitorum superficialis?

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

Question 71

Which one of the following muscles "points" the index finger?

A)extensor digiti minimi
B)extensor indicis
C)extensor digitorum longus
D)extensor digitorum brevis

Question 72

Irritation and inflammation of the medial epicondyle of the humerus and/or the common flexor tendon is usually called

A)lateral epicondylitis,lateral epicondylosis,or tennis elbow.
B)lateral epicondylitis,lateral epicondylosis,or golfer's elbow.
C)medial epicondylitis,medial epicondylosis,or pitcher's shoulder.
D)medial epicondylitis,medial epicondylosis,or golfer's elbow.

Question 73

Tenosynovitis of which two muscles can cause de Quervain's disease?

A)abductor pollicis longus and extensor pollicis longus
B)abductor pollicis longus and extensor pollicis brevis
C)extensor pollicis longus and extensor indicis
D)abductor pollicis longus and abductor pollicis brevis

Question 74

Which fingers of the hand have a separate muscle whose function it is to create extension of just that finger?

A)index finger,middle finger,and ring finger (fingers two through four)
B)thumb,index finger,and middle finger (fingers one through three)
C)thumb,index finger,and little finger (fingers one,two,and five)
D)thumb,index finger,and ring finger (fingers one,two,and four)

Question 75

The extensor digiti minimi attaches distally into a tendon of what muscle?

A)extensor digitorum
B)extensor indicis
C)extensor digitorum longus
D)brachioradialis