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Upper Limb Region By Region > Muscles > Flashcards

Muscles Flashcards

1
Q

What is the primary action of the biceps brachii?

A

Flexion of the elbow and supination of the forearm.

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2
Q

Which nerve supplies the triceps brachii?

A

Radial nerve.

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3
Q

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

A

True.

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4
Q

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

A

Median.

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5
Q

What is the main function of the rotator cuff muscles?

A

Stabilization of the shoulder joint.

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6
Q

Which muscle is primarily responsible for shoulder adduction?

A

Pectoralis major.

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7
Q

What is the nerve supply to the serratus anterior?

A

Long thoracic nerve.

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8
Q

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

A

False.

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9
Q

What action is performed by the extensor digitorum?

A

Extension of the fingers.

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10
Q

Which muscle is innervated by the ulnar nerve?

A

Flexor carpi ulnaris.

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11
Q

What is the primary action of the supraspinatus muscle?

A

Abduction of the arm.

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12
Q

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

A

Ulnar.

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13
Q

Which muscle assists in the upward rotation of the scapula?

A

Trapezius.

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14
Q

What is the function of the pectoralis minor?

A

Stabilizes the scapula by drawing it anteriorly and inferiorly.

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15
Q

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

A

False.

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16
Q

What muscle is responsible for the opposition of the thumb?

A

Opponens pollicis.

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17
Q

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

A

Musculocutaneous nerve.

18
Q

What is the primary action of the anconeus muscle?

A

Assists in elbow extension.

19
Q

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

A

Flexor carpi radialis.

20
Q

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

A

Subscapularis.

21
Q

What is the primary action of the latissimus dorsi?

A

Extension, adduction, and internal rotation of the shoulder.

22
Q

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

A

False.

23
Q

What is the role of the flexor digitorum superficialis?

A

Flexion of the proximal interphalangeal joints.

24
Q

Which muscle is primarily responsible for pronation of the forearm?

A

Pronator teres.

25
Q

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

A

Radial.

26
Q

What is the primary action of the flexor pollicis longus?

A

Flexion of the thumb.

27
Q

Which muscle is responsible for wrist extension?

A

Extensor carpi radialis longus.

28
Q

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

A

True.

29
Q

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

A

Ulnar and median nerves.

30
Q

What action is performed by the teres major?

A

Internal rotation, adduction, and extension of the shoulder.

31
Q

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

A

Median.

32
Q

What is the main action of the brachioradialis?

A

Flexion of the elbow.

33
Q

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

A

Extensor carpi ulnaris.

34
Q

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

A

True.

35
Q

What is the primary action of the rhomboids?

A

Retraction of the scapula.

36
Q

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

A

Axillary.

37
Q

What is the primary action of the extensor pollicis longus?

A

Extension of the thumb at the interphalangeal joint.

38
Q

Which muscle is involved in finger abduction?

A

Dorsal interossei.

39
Q

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

A

True.

40
Q

What is the primary action of the flexor digitorum profundus?

A

Flexion of the distal interphalangeal joints.

41
Q

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

A

Median.

Upper Limb Region By Region (2 decks)

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