Muscles Of The Hand

Question 1

What nerve primarily innervates the thenar muscles?

Answer 1

The median nerve.

Question 2

True or False: The ulnar nerve innervates the majority of the intrinsic muscles of the hand.

Answer 2

True.

Question 3

Which muscle is innervated by the radial nerve in the hand?

Answer 3

The extensor pollicis longus.

Question 4

Fill in the blank: The ______ nerve innervates the hypothenar muscles.

Answer 4

ulnar.

Question 5

What is the primary function of the lumbrical muscles?

Answer 5

To flex the metacarpophalangeal joints and extend the interphalangeal joints.

Question 6

Which two nerves are responsible for the sensory innervation of the hand?

Answer 6

Median nerve and ulnar nerve.

Question 7

True or False: The median nerve innervates the adductor pollicis muscle.

Answer 7

False.

Question 8

What type of joint movement do the interossei muscles facilitate?

Answer 8

Abduction and adduction of the fingers.

Question 9

Which muscle is NOT innervated by the ulnar nerve?

Answer 9

The flexor pollicis longus.

Question 10

What is the main role of the dorsal interossei muscles?

Answer 10

To abduct the fingers.

Question 11

Fill in the blank: The ______ nerve innervates the majority of the flexor muscles in the forearm.

Answer 11

median.

Question 12

What muscle is responsible for opposition of the thumb?

Answer 12

Opponens pollicis.

Question 13

Which nerve is responsible for sensory innervation to the skin over the lateral side of the hand?

Answer 13

Median nerve.

Question 14

True or False: The palmaris brevis muscle is innervated by the median nerve.

Answer 14

False.

Question 15

What is the action of the palmar interossei muscles?

Answer 15

Adduction of the fingers.

Question 16

Which muscle is innervated by both the ulnar and median nerves?

Answer 16

Flexor digitorum profundus.

Question 17

What is the primary function of the flexor digitorum superficialis?

Answer 17

To flex the proximal interphalangeal joints.

Question 18

Fill in the blank: The ______ nerve is responsible for the innervation of the flexor pollicis brevis (superficial head).

Answer 18

median.

Question 19

Which muscles are known as the ‘hypothenar muscles’?

Answer 19

Abductor digiti minimi, flexor digiti minimi brevis, and opponens digiti minimi.

Question 20

What is the innervation of the extensor digitorum muscle?

Answer 20

Radial nerve.

Question 21

True or False: The median nerve provides innervation to the skin of the palm.

Answer 21

True.

Question 22

Which muscle assists in flexing the metacarpophalangeal joints while extending the interphalangeal joints?

Answer 22

Lumbricals.

Question 23

What are the terminal branches of the brachial plexus that innervate the hand?

Answer 23

Median nerve, ulnar nerve, and radial nerve.

Question 24

Fill in the blank: The ______ nerve supplies the skin over the medial side of the hand.

Answer 24

ulnar.

Question 25

Which muscles are affected in ulnar nerve palsy?

Answer 25

Hypothenar muscles and interossei muscles.

Question 26

What is the primary role of the flexor pollicis longus?

Answer 26

To flex the thumb.