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Musculo-skeletal > Upper Limb Anatomy 3 & 4 > Flashcards

Upper Limb Anatomy 3 & 4 Flashcards

1
Q

Name the muscles in the superficial group of the anterior forearm

A
  • Pronator teres
  • Flexor carpi radialis
  • Palmaris longus
  • Flexor carpi ulnaris
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2
Q

What are the superficial muscles of the anterior forearm attached to ?

A

The medial epicondyle of the humerus by the common flexor tenson

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3
Q

What are the actions of pronator teres?

A

Pronation and flexion of the forearm

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4
Q

What is the innervation of pronator teres?

A

Median n. (C6-7)

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5
Q

What are the actions of flexor carpi ulnaris?

A
  • Flexion of the wrist

- Adduction of the wrist

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6
Q

What are the actions of flexor carpi radialis?

A
  • Flexion of the wrist

- Abduction of the wrist

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7
Q

Which nerve innervates flexor carpi ulnaris?

A

Ulnar nerve

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8
Q

Which nerve innervates the superficial muscles of the anterior forearm (other than flexor carpi ulnaris)?

A

Median nerve

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9
Q

What is the main action of brachioradialis?

A

Flexion of the elbow in mid-pronated position

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10
Q

What is the innervation of the brachioradialis muscle?

A

Radial (C5,6 & 7)

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11
Q

Which fingers are the four tendons of flexor digitorum superficialis attached to?

A

Index, long, ring and small fingers (attached to middle phalanges)

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12
Q

What are the actions of the flexor digitorum superficialis?

A

Flexion of the wrist, metacarpophalangeal and interphalangeal joints

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13
Q

What is the innervation of flexor digitorum superficialis?

A

Median n. (C7-T1)

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14
Q

Name the three deep muscles of the forearm

A
  • Flexor digitorum profundus
  • Flexor pollicis longus
  • Pronator quadratus
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15
Q

What is the main action of flexor digitorum profundus?

A

Flexion of the wrist and finger joints

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16
Q

What is the innervation of the FDP?

A
  • Medial half (little + ring fingers): Ulnar nerve

- Lateral half (Middle and index fingers): Median nerve

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17
Q

What is the action of flexor pollicus longus and what is its innervation?

A
  • Long flexor of the thumb

- Median n. (anterior interosseus)

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18
Q

What is the action and innervation of pronator quadratus?

A
  • Pronation of the forearm

- Median nerve

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19
Q

Which muscles of the forearm are not supplied by the median nerve?

A
  • Flexor carpi ulnaris

- Medial half of flexor digitorum profundus

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20
Q

What are the two terminal branches of the brachial artery?

A
  • Radial

- Ulnar

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21
Q

Name the borders of the carpal tunnel

A
  • Roof: flexor retinaculum (fibrous band)
  • Lateral border: scaphoid and trapezium
  • Medial border: pisiform and hamate bones
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22
Q

Name the contents of the carpal tunnel

A
  • Median nerve
  • 4 tendons of flexor digitorum profundus
  • 4 tendons of flexor digitorum superficialis
  • Tendon of flexor pollicis longus
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23
Q

Which muscle of the forearm is continuous with the palmar aponeurosis

A

Palmar longus

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24
Q

Name the five compartments of the hand which contain intrinsic muscles of the hand

A
  • Thenar
  • Hypothenar
  • Adductor
  • Central (lumbricals and long flexor tendons)
  • Interosseous
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25
Q

Name the three thenar muscles of the hand

A
  • Abductor pollicis brevis
  • Flexor pollicis brevis
  • Opponens pollicis
26
Q

What is the action of the thenar muscles?

A

Apposition of the thumb

27
Q

Which nerve innervates the thenar muscles?

A

Median (C6-8)

28
Q

Name the hypothenar muscles

A
  • Abductor digiti minimi
  • Flexor digiti minimi
  • Opponens digiti minimi
29
Q

Which nerve innervates the hypothenar muscles?

A

Ulnar nerve (C8-T1)

30
Q

Name the two heads of adductor pollicis

A

Transverse and oblique heads

31
Q

Which nerve innervates adductor pollicis

A

Ulnar nerve

32
Q

What is the action of adductor pollicis?

A

Adducts the thumb

33
Q

From which tendon do the lumbricals originate?

A

Tendon of flexor digitorum profundus

34
Q

What are the actions of the lumbricals?

A
  • Flexion of the fingers at the metacarpophalangeal joint

- Extension at the interphalangeal joint of 2nd to 5th digits

35
Q

What is the innervation of the lumbricals?

A
  • Medial 2: ulnar nerve

- Lateral 2: median nerve

36
Q

What is the action of the dorsal interossei?

A

Abduction of the fingers

37
Q

What is the action of the palmar interossei?

A

Adduction of the fingers

38
Q

What is the innervation of the interossei?

A

Ulnar (C8-T1)

39
Q

Which two arteries supply all of the blood to the hand?

A

Ulnar and radial arteries

40
Q

Which artery is the main contributor of the superficial palmar arch?

A

Ulnar

41
Q

Which artery is the main contributor of the deep palmar arch?

A

Radial

42
Q

Which muscles are the only intrinsic muscles of the hand not supplied by the ulnar nerve?

A
  • Thenar muscles

- First and second lumbricals

43
Q

Which branch of the brachial plexus gives rise to the ulnar nerve?

A

Medial

44
Q

What type of joint is the wrist joint?

A

Condyloid/ellipsoid

45
Q

Which movements are possible at the wrist joint?

A
  • Flexion
  • Extension
  • Circumduction
  • Adduction
  • Abduction
46
Q

What is the combined action of extensor and flexor carpi ulnaris muscle on the wrist joint?

A

Adduction of the wrist

47
Q

Which muscles are responsible for abduction of the wrist joint?

A
  • Abductor pollicis longus
  • Flexor carpi radialis
  • Extensor carpi radialis longus
  • Extensor carpi radialis brevis
48
Q

What is the action of most of the posterior compartment muscles of the forearm on the wrist joint?

A

Extension

49
Q

Name the three muscles that extend and abduct or adduct the wrist

A
  • Extensor carpi radialis longus
  • Extensor carpi radialis brevis
  • Extensor carpi ulnaris
50
Q

Which muscles extend the medial four digits?

A
  • Extensor digitorum
  • Extensor indicis
  • Extensor digiti minimi
51
Q

What are the actions of extensor digitorum?

A

Extensor of the fingers and wrist

52
Q

Name the muscles that extend or abduct the thumb

A
  • Abductor pollicis longus
  • Extensor pollicis brevis
  • Extensor pollicis longus
53
Q

Which nerve innervates all the muscles in the posterior compartment of the forearm?

A

Radial

54
Q

What is the nerve supply to the supinator muscle?

A

Radial nerve - deep branch

55
Q

Which carpal bones can be felt in the anatomical snuff box?

A

Scaphoid and trapezium

56
Q

Which artery lies on the floor of the snuff box?

A

Radial

57
Q

What is the action of the EPL and EPB muscles?

A

Extension of the thumb

58
Q

What is the action of the APL muscle?

A

Abduction of the thumb

59
Q

Which muscles attach to the extensor hood of the hand?

A

Lumbricals, dorsal interossei and extensor digitorum

60
Q

What is the innervation of the EPL, EPB and APL muscles of the thumb?

A

Radial

Musculo-skeletal (27 decks)

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