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Anatomy > Unit Four: The Wrist and Hand > Flashcards

Unit Four: The Wrist and Hand Flashcards

1
Q

What innervates the brachioradialis and triceps brachii?

A

The radial nerve.

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2
Q

What is the action of the pronator teres?

A

To pronate the forearm.

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3
Q

What is the action of the palmaris longus?

A

Weak wrist flexor.

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4
Q

What is the action of the flexor digitorum superficialis?

A

Flexes wrist at the PIP joints (and the 2nd to 5th MP joints).

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5
Q

What is the MP joint?

A

The metacarpophalangeal (MP) joint

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6
Q

What is the IP joint?

A

The interphalangeal joint.

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7
Q

What is the action of the flexor pollicis longus?

A

To flex the MP and IP joint at the thumb

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8
Q

What does pollicis/pollex mean?

A

Thumb.

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9
Q

What is the action of the flexor digitorium profundus? (2)

A
  1. Flexes the wrist. 2. Flexes the 2nd to 5th MP, IP, and DP joints.
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10
Q

What innervates the medial portion of the flexor digitorium profundus?

A

The ulnar nerve.

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11
Q

What innervates the lateral portion of the flexor digitorium profundus?

A

The median nerve.

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12
Q

Where does the pronator teres originate and insert?

A
  1. It originates on the medial epicondyle of the humerus. 2. It inserts on the lateral radius.
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13
Q

What is the action of the pronator quadratus?

A

To pronate the forearm.

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14
Q

What innervates the pronator quadratus?

A

The median nerve.

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15
Q

What is the action of the extensor carpi radialis longus and extensor carpi radialis brevis? (2)

A
  1. Extend the wrist. 2. Abducts the hand.
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16
Q

What is the action of the extensor digitorum? (2)

A
  1. Extends wrist. 2. Extends 2nd to 5th MP, PIP, and DP joints.
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17
Q

What is the action of the extensor digiti minimi? (2)

A
  1. Extends wrist. 2. Extends MP and PIP joints of finger 5.
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18
Q

What is the action of the extensor carpi ulnaris? (2)

A
  1. Extends wrist. 2. Adducts hands.
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19
Q

What is the action of the abductor pollicis longus?

A

To abduct the thumb.

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20
Q

What is the action of the extensor pollicis brevis?

A

Extends MP joints of thumb.

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21
Q

What is the action of the extensor pollicis longus?

A

Extends the MP and IP joints of the thumb.

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22
Q

What is the action of the extensor indicis?

A

Extends MP, PIP, and DIP joints of finger 2 (index).

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23
Q

What is the action of the supinator?

A

To supinate the forearm.

24
Q

What is the action of the flexor pollicis brevis?

A

To flex the thumb.

25
Q

What is the action of the abductor pollicis brevis?

A

To abduct the thumb.

26
Q

What is the action of the opponens pollicis?

A

To oppose the thumb.

27
Q

What is the function of the flexor digiti minimi?

A

To flex finger 5.

28
Q

What is the function of the abductor digiti minimi?

A

To abduct finger 5.

29
Q

What is the action of the opponens digit minimi?

A

To oppose finger 5.

30
Q

What is the action of the lumbricals? (2)

A
  1. Flexes 2nd-5th MP joints. 2. Extends 2nd-5th PIP and DIP joints.
31
Q

What is the action of the dorsal interossei?

A

To abduct finger 2-5.

32
Q

What is the action of the palmar interossei?

A

To adduct finger 2-5.

33
Q

What is the action of the adductor pollicis?

A

To adduct the thumb.

34
Q

The median nerve innervates all flexors but which two?

A
  1. Flexor carpi ulnaris. 2. Medial portion of flexor digitorum profundus.
35
Q

What innervates the supinator?

A

The radial nerve.

36
Q

What innervates the abductor pollicis longus?

A

The radial nerve.

37
Q

What muscles comprise the thenar group of the intrinsic muscles of the hand? (3)

A
  1. Flexor pollicis brevis. 2. Abductor pollicis brevis. 3. Opponens pollicis.
38
Q

What innervates the thenar group of intrinsic muscles of the hand?

A

The median nerve.

39
Q

What three muscles comprise the hypothenar group of intrinsic muscles of the hand?

A
  1. Flexor digiti minimi. 2. Abductor digiti minimi. 3. Opponens digiti minimi.
40
Q

What innervates the hypothenar and midpalmar group of intrinsic muscles of the hand?

A

The ulnar nerve.

41
Q

What innervates the lateral and medial lumbricals?

A

Lateral 2: Ulnar. Medial 2: Ulnar nerve.

42
Q

Where does the flexor carpi radialis originate and insert?

A
  1. Originates on the medial epicondyle. 2. Inserts on the base of the 2nd and 3rd metacarpals.
43
Q

Where does the flexor carpi ulnaris originate and insert?

A
  1. Originates on the medial epicondyle. 2. Inserts on the medial carpal and and metacarpal bones.
44
Q

Where does the pronator quadratus originate and insert?

A
  1. Originates on the distal ulna. 2. Inserts on the distal radius.
45
Q

What are the three primary elbow flexors?

A
  1. Brachii. 2. Brachioradialis. 3. Brachialis.
46
Q

What are the two primary forearm pronators?

A
  1. Pronator teres. 2. Pronator quadratus.
47
Q

What artery supplies blood to the anterior muscles of the forearm?

A

Ulnar artery.

48
Q

What artery supplies blood to the extensor digiti minimi and extensor digitorum?

A

The posterior interosseous artery.

49
Q

What artery supplies blood to the brachioradialis?

A

The radial (Recurrent) artery.

50
Q

What artery supplies blood to the extensor carpi radialis longus and brevis?

A

The radial artery.

51
Q

What artery supplies the supinator?

A

The radial (reccurent) artery.

52
Q

What artery supplies the extensor indicis, abductor pollicis longus, extensor pollicis brevis, and extensor pollicis longus?

A

The posterior interosseous artery.

53
Q

What artery supplies the flexor pollicis longus, pronator quadratus, and flexor digitorum profundus?

A

The anterior interosseous artery.

54
Q

What artery supplies the thenar group?

A

Superficial palmar arch.

55
Q

What artery supplies the hypothenar group?

A

Ulnar artery.

56
Q

What artery supplies the midpalmar group?

A

Superficial palmar arch.

Anatomy (38 decks)

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