Muscles of Hand

Question 1

______ is NOT a part of hand:
a) Wrist (carpus)
b) Metacarpus
c) Metatarsals
d) Fingers (digits)

Answer 1

Metatarsals

Question 2

Define hand?

Answer 2

Hand is the region of upper limb distal to the wrist joint

Question 3

Abduction and adduction of the fingers are defined with respect to the long axis of the middle finger. True or false?

Answer 3

True

Question 4

Thenar eminence is innervated by _______ nerve

Answer 4

Median nerve

Question 5

Function of Thenar eminence is?

Answer 5

Movement of the thumb

Question 6

Hypothenar eminence is innervated by _______ nerve

Answer 6

Ulnar nerve

Question 7

Function of Hypothenar eminence is?

Answer 7

Movement of the little finger

Question 8

Carpal bones form an arch called _______ arch

Answer 8

Carpal arch

Question 9

What are the primary ligaments of the hand?
a) Radial and ulnar collateral ligaments
b) Radial and ulnar collateral ligaments and the palmar radiocarpal ligament
c) Radial and ulnar collateral ligaments and the dorsal radiocarpal ligament
d) Radial and ulnar collateral ligaments and the transverse carpal ligament

Answer 9

Radial and ulnar collateral ligaments and the palmar radiocarpal ligament

Question 10

Flexor retinaculum attaches to the anterior side and forms the carpal tunnel. True or false?

Answer 10

True

Question 11

Which of the following is NOT the content of carpal tunnel?
a) Tendons of flexor digitorum superficialis
b) Tendons of flexor digitorum profundus
c) Tendon of flexor pollicis longus
d) Ulnar nerve

Answer 11

Ulnar nerve.

Question 12

Which nerve is the content of carpal tunnel?

Answer 12

Median nerve.

Question 13

What nerve is compressed in carpal tunnel syndrome?
a) Ulnar nerve
b) Radial nerve
c) Median nerve
d) Sciatic nerve

Answer 13

Median nerve.

Question 14

What is the most common cause of carpal tunnel syndrome?
a) Arthritis
b) Diabetes
c) Repetitive hand motions
d) Trauma

Answer 14

Repetitive hand motions

Question 15

What are common symptoms of carpal tunnel syndrome?
a) Tingling and numbness in the hand
b) Weakness in the hand
c) Pain in the wrist and forearm
d) All of the above

Answer 15

All of the above

Question 16

_________ sheaths hold the tendons to the bony plane and prevent the tendons from bowing when the digits are flexed.

Answer 16

Fibrous sheaths

Question 17

Fibrous sheath is formed by _______ and ________ ligaments.

Answer 17

Annular and cruciate ligaments

Question 18

What is the function of Synovial sheaths?

Answer 18

Reduce friction between tendon and osseofibrous tunnels

Question 19

Ulnar bursa contains tendons of:
a) the flexor digitorum superficialis and profundus
b) extensor digitorum superficialis only
c) biceps brachii and extensor digiti minimi
d) extensor pollicis longus and abductor pollicis brevis

Answer 19

the flexor digitorum superficialis and profundus

Question 20

Extensor retinaculum is thickened part of the superficial fascia that holds the extensor tendons in place. True or false?

Answer 20

False. Extensor retinaculum is thickened part of the antebrachial fascia

Question 21

Extensor pollicis longus tendon crosses the ___________ muscle and _______ tendon.

Answer 21

extensor carpi radialis brevis and longus tendons

Question 22

Extensor tendon compartment 1 of the wrist has:
a) Extensor carpi radialis longus and brevis tendons
b) Abductor pollicis longus and extensor pollicis brevis tendons
c) Extensor digiti minimi tendon
d) Extensor digitorum and extensor indicis tendons

Answer 22

Abductor pollicis longus and extensor pollicis brevis tendons

Question 23

Extensor tendon compartment 2 of the wrist has:
a) Extensor carpi radialis longus and brevis tendons
b) Abductor pollicis longus and extensor pollicis brevis tendons
c) Extensor digiti minimi tendon
d) Extensor digitorum and extensor indicis tendons

Answer 23

Extensor carpi radialis longus and brevis tendons

Question 24

Extensor tendon compartment 5 of the wrist has:
a) Extensor carpi radialis longus and brevis tendons
b) Abductor pollicis longus and extensor pollicis brevis tendons
c) Extensor digiti minimi tendon
d) Extensor digitorum and extensor indicis tendons

Answer 24

Extensor digiti minimi tendon

Question 25

Extensor tendon compartment 3 of the wrist has: a) Extensor carpi radialis longus and brevis tendons b) Abductor pollicis longus and extensor pollicis brevis tendons c) Extensor pollicis longus tendon d) Extensor digitorum and extensor indicis tendons

Answer 25

Extensor pollicis longus tendon

Question 26

Extensor tendon compartment 4 of the wrist has: a) Extensor digitorum and extensor indicis tendons b) Extensor carpi ulnaris c) Extensor pollicis longus tendon d) Extensor digitorum and extensor indicis tendons

Answer 26

Extensor digitorum and extensor indicis tendons

Question 27

Extensor tendon compartment 6 of the wrist has: a) Extensor digitorum and extensor indicis tendons b) Extensor carpi ulnaris c) Extensor pollicis longus tendon d) Extensor digitorum and extensor indicis tendons

Answer 27

Extensor carpi ulnaris

Question 28

The Palmar aponeurosis is a ____________ structure located in the palm of the hand

Answer 28

Fibrous

Question 29

Palmar aponeurosis is continuous with the _____________, which is a thick band of tissue on the wrist.

Answer 29

Fascia

Question 30

Palmar aponeurosis provides protection and support to the underlying structures of the palm, and helps maintain the shape and contour of the hand. True or false?

Answer 30

True

Question 31

The Palmar aponeurosis is an important anatomical landmark, as it contains the _____________, which is a superficial vein used for medical procedures.

Answer 31

Cephalic vein

Question 32

What is the function of the Palmaris brevis muscle? a) To flex the wrist b) To extend the fingers c) To adduct the thumb d) To wrinkle the skin on the palm of the hand

Answer 32

To wrinkle the skin on the palm of the hand

Question 33

Which nerve innervates the Palmaris brevis muscle?

Answer 33

Ulnar nerve

Question 34

Which of the following is NOT a common clinical use of the Palmaris brevis muscle? a) Assessing ulnar nerve function b) Diagnosing carpal tunnel syndrome c) Assessing hand strength d) Assessing hand sensation

Answer 34

Diagnosing carpal tunnel syndrome

Question 35

In what percentage of the population is the Palmaris brevis muscle absent?

Answer 35

75%

Question 36

How many Dorsal interossei muscles are there in the hand?

Answer 36

4

Question 37

What is the function of the Dorsal interossei muscles? a) To flex the fingers b) To extend the fingers c) To abduct the fingers d) To adduct the fingers

Answer 37

To abduct the fingers

Question 38

Which of the following is not a Dorsal interossei muscle? a) Dorsal interosseous muscle of the thumb b) Dorsal interosseous muscle of the index finger c) Dorsal interosseous muscle of the middle finger d) Dorsal interosseous muscle of the ring finger

Answer 38

Dorsal interosseous muscle of the thumb

Question 39

The ________ palmar interosseous muscle is rudimentary.

Answer 39

First

Question 40

How many Palmar interossei muscles are there in the hand? a) 2 b) 3 c) 4 d) 5

Answer 40

3

Question 41

What is the function of the Palmar interossei muscles? a) To flex the fingers b) To extend the fingers c) To abduct the fingers d) To adduct the fingers

Answer 41

To adduct the fingers

Question 42

Which nerve innervates the Palmar interossei muscles?

Answer 42

Ulnar nerve

Question 43

Which fingers do the Palmar interossei muscles adduct? a) Index and middle fingers b) Middle and ring fingers c) Ring and little fingers d) All of the above

Answer 43

All of the above

Question 44

Which of the following is not a part of the Adductor pollicis muscle? a) Oblique head b) Transverse head c) Long head d) Short head

Answer 44

Long head

Question 45

Which muscle opposes the action of the Adductor pollicis muscle? a) Abductor pollicis longus b) Extensor pollicis longus c) Flexor pollicis longus d) Opponens pollicis

Answer 45

Abductor pollicis longus

Question 46

_________ nerve innervates the Adductor pollicis muscle

Answer 46

Ulnar nerve

Question 47

What is the function of the Adductor pollicis muscle?

Answer 47

To adduct the thumb

Question 48

How many Lumbrical muscles are there in the hand? a) 2 b) 3 c) 4 d) 5

Answer 48

4

Question 49

What is the function of the Lumbrical muscles? a) To flex the fingers b) To extend the fingers c) To adduct the fingers d) To assist in finger extension and flexion

Answer 49

To assist in finger extension and flexion

Question 50

Which nerve innervates the Lumbrical muscles?

Answer 50

Medial two lumbricals by ulnar nerve Lateral two lumbricals by median nerve

Question 51

Which fingers do the Lumbrical muscles originate from? a) Index and middle fingers b) Middle and ring fingers c) Ring and little fingers d) All of the above

Answer 51

Middle and ring fingers

Question 52

Which muscle is responsible for the flexion of the MCP joint during extension of the IP joint? a) Flexor digitorum superficialis b) Flexor digitorum profundus c) Lumbrical muscles d) Flexor pollicis longus

Answer 52

Lumbrical muscles

Question 53

Most superficial muscle of the thenar region is?

Answer 53

Abductor pollicis brevis muscle

Question 54

What is the function of the Abductor pollicis brevis muscle?

Answer 54

To abduct the thumb

Question 55

Which nerve innervates the Abductor pollicis brevis muscle? a) Median nerve b) Ulnar nerve c) Radial nerve d) Musculocutaneous nerve

Answer 55

Median nerve

Question 56

Which of the following is not a part of the Abductor pollicis brevis muscle? a) Oblique head b) Transverse head c) Long head d) None of the above

Answer 56

None of the above

Question 57

What is the function of the Flexor pollicis brevis muscle?

Answer 57

To flex the thumb

Question 58

Which of the following is not a part of the Flexor pollicis brevis muscle? a) Superficial head b) Deep head c) Middle head d) All of the above are part of the muscle

Answer 58

Middle head

Question 59

Insertion of Flexor pollicis brevis muscle is?

Answer 59

Proximal phalanx of the thumb

Question 60

Which nerve innervates the Flexor pollicis brevis muscle?

Answer 60

Median nerve

Question 61

Deepest and largest muscle of the thenar region is?

Answer 61

Opponens pollicis muscle

Question 62

What is the function of the Opponens pollicis muscle? a) To extend the wrist b) To abduct the fingers c) To adduct the fingers d) Medial rotation of the thumb

Answer 62

Medial rotation of the thumb

Question 63

Which of the following is NOT a thenar muscle? a) Flexor pollicis brevis muscle b) Abductor digiti minimi muscle c) Abductor pollicis brevis muscle d) Opponens pollicis muscle

Answer 63

Abductor digiti minimi muscle

Question 64

Most superficial muscle of the hypothenar region is __________

Answer 64

Abductor digiti minimi muscle

Question 65

Which nerve innervates the Abductor digiti minimi muscle?

Answer 65

Ulnar nerve

Question 66

What is the function of the Abductor digiti minimi muscle?

Answer 66

To abduct the little finger

Question 67

Origin of Flexor digiti minimi brevis is?

Answer 67

Hook of the hamate Flexor retinaculum

Question 68

The function of the Flexor digiti minimi brevis muscle is to flex the little finger. True or false?

Answer 68

True

Question 69

Which muscle opposes the action of the Flexor digiti minimi brevis muscle? a) Extensor digiti minimi b) Abductor digiti minimi c) Adductor pollicis d) Abductor pollicis brevis

Answer 69

Extensor digiti minimi

Question 70

_________ muscle is a rare anatomical variation and not found in humans

Answer 70

Flexor digiti minimi longus muscle

Question 71

What is the function of the Opponens digiti minimi muscle? a) To extend the wrist b) To abduct the fingers c) To oppose the little finger d) To flex the thumb

Answer 71

To oppose the little finger

Question 72

Which nerve innervates the Opponens digiti minimi muscle?

Answer 72

Ulnar nerve

Question 73

Which of the following is not a part of the Opponens digiti minimi muscle? a) Superficial head b) Deep head c) Tendinous slip d) All of the above are part of the muscle

Answer 73

All of the above are part of the muscle

Question 74

Which muscle opposes the action of the Opponens digiti minimi muscle? a) Extensor digiti minimi b) Abductor digiti minimi c) Adductor pollicis d) Abductor pollicis brevis

Answer 74

Abductor digiti minimi

Question 75

Name the hypothenar muscles of hand?

Answer 75

Abductor digiti minimi Flexor digiti minimi brevis Opponens digiti minimi