Muscles

Question 1

What is the primary action of the biceps brachii?

Answer 1

Flexion of the elbow and supination of the forearm.

Question 2

Which nerve supplies the triceps brachii?

Answer 2

Radial nerve.

Question 3

True or False: The deltoid muscle is responsible for shoulder abduction.

Answer 3

True.

Question 4

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

Answer 4

Median.

Question 5

What is the main function of the rotator cuff muscles?

Answer 5

Stabilization of the shoulder joint.

Question 6

Which muscle is primarily responsible for shoulder adduction?

Answer 6

Pectoralis major.

Question 7

What is the nerve supply to the serratus anterior?

Answer 7

Long thoracic nerve.

Question 8

True or False: The flexor carpi radialis is responsible for wrist extension.

Answer 8

False.

Question 9

What action is performed by the extensor digitorum?

Answer 9

Extension of the fingers.

Question 10

Which muscle is innervated by the ulnar nerve?

Answer 10

Flexor carpi ulnaris.

Question 11

What is the primary action of the supraspinatus muscle?

Answer 11

Abduction of the arm.

Question 12

Fill in the blank: The __________ nerve innervates the majority of the hand muscles.

Answer 12

Ulnar.

Question 13

Which muscle assists in the upward rotation of the scapula?

Answer 13

Trapezius.

Question 14

What is the function of the pectoralis minor?

Answer 14

Stabilizes the scapula by drawing it anteriorly and inferiorly.

Question 15

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

Answer 15

False.

Question 16

What muscle is responsible for the opposition of the thumb?

Answer 16

Opponens pollicis.

Question 17

Which nerve is responsible for the innervation of the anterior compartment of the arm?

Answer 17

Musculocutaneous nerve.

Question 18

What is the primary action of the anconeus muscle?

Answer 18

Assists in elbow extension.

Question 19

Fill in the blank: The __________ muscle is involved in wrist flexion and is innervated by the median nerve.

Answer 19

Flexor carpi radialis.

Question 20

Which muscle forms the bulk of the shoulder’s rotator cuff?

Answer 20

Subscapularis.

Question 21

What is the primary action of the latissimus dorsi?

Answer 21

Extension, adduction, and internal rotation of the shoulder.

Question 22

True or False: The radial nerve innervates the muscles in the anterior compartment of the forearm.

Answer 22

False.

Question 23

What is the role of the flexor digitorum superficialis?

Answer 23

Flexion of the proximal interphalangeal joints.

Question 24

Which muscle is primarily responsible for pronation of the forearm?

Answer 24

Pronator teres.

Question 25

Fill in the blank: The __________ nerve supplies the muscles of the posterior forearm.

Answer 25

Radial.

Question 26

What is the primary action of the flexor pollicis longus?

Answer 26

Flexion of the thumb.

Question 27

Which muscle is responsible for wrist extension?

Answer 27

Extensor carpi radialis longus.

Question 28

True or False: The coracobrachialis is responsible for shoulder flexion and adduction.

Answer 28

True.

Question 29

What is the nerve supply to the intrinsic muscles of the hand?

Answer 29

Ulnar and median nerves.

Question 30

What action is performed by the teres major?

Answer 30

Internal rotation, adduction, and extension of the shoulder.

Question 31

Fill in the blank: The __________ nerve innervates the flexor digitorum profundus (lateral half).

Answer 31

Median.

Question 32

What is the main action of the brachioradialis?

Answer 32

Flexion of the elbow.

Question 33

Which muscle is primarily involved in the extension of the wrist?

Answer 33

Extensor carpi ulnaris.

Question 34

True or False: The palmaris longus is absent in approximately 14% of the population.

Answer 34

True.

Question 35

What is the primary action of the rhomboids?

Answer 35

Retraction of the scapula.

Question 36

Fill in the blank: The __________ nerve is responsible for innervating the teres minor.

Answer 36

Axillary.

Question 37

What is the primary action of the extensor pollicis longus?

Answer 37

Extension of the thumb at the interphalangeal joint.

Question 38

Which muscle is involved in finger abduction?

Answer 38

Dorsal interossei.

Question 39

True or False: The opponens digiti minimi is responsible for the opposition of the little finger.

Answer 39

True.

Question 40

What is the primary action of the flexor digitorum profundus?

Answer 40

Flexion of the distal interphalangeal joints.

Question 41

Fill in the blank: The __________ nerve innervates the abductor pollicis brevis.

Answer 41

Median.