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Anatomy > Hand > Flashcards

Hand Flashcards

1
Q

Cutaneous Innervation of the hand (Nerves)

A

Green: Musculocutaneous nerve
Pink: Radial nerve
Purple: Medial cutaneous nerve of forearm
Blue: Ulnar nerve
Yellow: Median nerve

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2
Q
A
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3
Q

Where does the Median nerve begin and end?

A

Enters the forearm between the 2 heads of the pronator teres–> gives muscular branches/motor branches in forearm–> hand region (sensory branches) to dorsal and palmar.

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4
Q

Where does the Ulnar nerve begin and end?

A

Branch coming from the brachial plexus (no branch in arm regoin)–>enters forearm under flexor carpi ulnaris–>intervenes flexor carpi ulnaris and flexor medial digitorum profundus–> enters hand region (gives motor branches to some muslces and sensory branches)

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5
Q
A

Green:Dorsal digital veins
Purple: Metacarpal vein

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6
Q

Superficial vein of the hand on the dorsal surface?

A

Dorsal digital vein–>Metacarpal vein–>Dorsal venous plexus–>Cephalic vein(radial side) and Basilic vein (ulnar side)

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7
Q

What is the clinical importance of the superficial veins?

A

Sometimes you withdraw or give drugs through them

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8
Q

What is the path of the Cephalic vein and what side does it pass on?

A

passes on the radial side. In the arm region it is called the Brachial cephalic vein–> passes between the deltoid muscle and pectoralis major–> drains into Axillary vein

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9
Q

What’s the path of the Basilic vein and what side does it pass on?

A

It passes on the ulnar side (Anterbrachial basilic vein)–> Continues in arm region as Brachial basilic vein–> pierces structure and becomes deep–> Continues as Axillary vein

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10
Q
A

Top: Basilic vein
Down: Dorsal venous Arch
Left: Cephalic vein

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11
Q

Superficial vein of the hand on the Palmar surface?

A

Palmar digital veins–> Palmar venous plexus–> Median vein of forearm(usually drains into the medial cubital vein but a deviation is dividing into 2 branches- cephalic and basilic vein)

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12
Q

What is the Synovial sheath?

A

Wherethetendon
crossjoints(wrist joint),theyare
sheathedinthin
membranesare knownas
synovial membrane (bursae)

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13
Q

Function of Synovial sheath

A

providelubricatonto decrease friction.

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14
Q

Inflammation of bursae

A

Bursitis

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15
Q

Clinical importance of ulna and radial bursa communicating with each other

A

If there is inflammation in Ulnar bursa it can affect Radial bursa

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16
Q

Synovial sheaths: Flexor aspect

A
  1. Flexor digitorum superficialis
    Flexor digitorum profundus
  2. Flexor policis longus
  3. Flexor carpi radialis
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17
Q
A

Ulnar bursae
1. Flexor digitorum superficialis
Flexor digitorum profundus
(continues up to distal phalanx of little finger)
(8 tendons)

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18
Q
A

Radial bursa
2. Flexor policis longus
(continues to distal phalanx of thumb)

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19
Q
A
  1. Flexor carpi radialis
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20
Q

Synovial sheaths: Extensor aspect

A
  1. Extansor pollicis brevis
    Abductor pollicis longus
  2. Extansor carpi radialis longus
    Extansor carpi radialis brevis
  3. Extansor pollicis longus
  4. Extansor digitorum communis
    Extansor indicis proprius
  5. Extansor digiti minimi
  6. Extansor carpi ulnaris
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21
Q
A
  1. Extansor digitorum communis
    Extansor indicis proprius
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22
Q
A
  1. Extansor carpi radialis longus
    Extansor carpi radialis brevis
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23
Q
A
  1. Extansor pollicis longus
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24
Q
A
  1. Extansor pollicis brevis
    Abductor pollicis longus
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25
Q
A
  1. Extansor digiti minimi
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26
Q
A
  1. Extansor carpi ulnaris
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27
Q
A

Palmar aponeurosis

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28
Q

What does the Palmar aponeurosis recieve insertion?

A

Proximally receive insertion of palmaris longus and partly attach to flexor retinaculum

29
Q

What does the Palmar aponeurosis divide into?

A

Distally divide into 4 slips–> attach to base of proximal phalanx of medial 4 fingers and attaches to dorsal digital expansion

30
Q
A

Dorsal Digital Expansion

31
Q

What is the Dorsal Digital Expansion, its location and function?

A

A triangular fibrous tissue, at the metacharpal phalangeal joint at dorsal surface. Recieves insertion of function.

32
Q
A
33
Q
A

Palmaris brevis

34
Q

Palmaris brevis origin

A

palmar aponeurosis, flexor retinaculum

35
Q

Palmaris brevis insertion

A

skin on the ulnar side of the hand

36
Q

Palmaris brevis function

A

Important in gripping,
Tenses the palmar aponeurosis

37
Q

Palmaris brevis nerve

A

Ulnar nerve

38
Q
A

In between: Intermediate compartment

39
Q

Thenear region muscles

A
  1. Abductor pollicis brevis
  2. Flexor pollicis brevis
  3. Opponens pollicis
  4. Adductor policis
40
Q

How can the Opponens pollicis be seen?

A

After reflecting Abductor pollicis brevis
and Flexor pollicis brevis

41
Q
A
42
Q

Abductor pollicis brevis origin

A

Flexor retinaculum, scaphoid & trapezium

43
Q

Abductor pollicis brevis insertion

A

radial side base of proximal phalanx of thumb

44
Q

Abductor pollicis brevis nerve

A

Median nerve

45
Q

Abductor pollicis brevis function

A

Abducts the thumb

46
Q

Flexor pollicis brevis origin

A

2 heads
superficial head: Flexor retinaculum & trapezium
Deep head: trapezoid & capitate

47
Q

Flexor pollicis brevis origin

A

radial side base of proximal phalanx of thumb

48
Q

Flexor pollicis brevis nerve

A

superficial head: Median nerve
deep head:Ulnar nerve

49
Q

Flexor pollicis brevis function

A

Flexes the thumb

50
Q

Opponens pollicis origin

A

Flexor retinaculum, scaphoid & trapezium

51
Q

Opponens pollicis insertion

A

radial side of 1st metecarpal bone of thumb

52
Q

Opponens pollicis function

A

Rotates the 1st metecarpal bone medially, it brings the thumb into opposition with the other fingers

53
Q

Opponens pollicis nerve

A

Median nerve

54
Q
A

Adductor pollicis muscle

55
Q

Adductor pollicis origin

A

2 heads
transverse head: anterior surface of 3rd metecarpal bone
Oblique head: capitate & base of 2nd, 3rd metecarpal bone

56
Q

Adductor pollicis insertion

A

ulnar side base of proximal phalanx of thumb

57
Q

Adductor pollicis nerve

A

Ulnar nerve

58
Q

Adductor pollicis function

A

Adducts the thumb

59
Q

Hypothenear region

A

Abductor digiti minim
Flexor digiti minim
Opponens digiti minim

60
Q

What nerves intervenes all the muscles in the Hypothenear region.

A

Ulnar nerve

61
Q

Abductor digiti minimi origin

A

pisiform bone, pisohamate ligament, tendon of flexor carpi ulnaris muscle

62
Q

Abductor digiti minimi insertion

A

ulnar side of the base of proximal phalanx of 5th digit

63
Q

Abductor digiti minimi nerve

A

Ulnar nerve

64
Q

Abductor digiti minimi function

A

Abducts the little finger

65
Q

Flexor digiti minimi origin

A

hamate bone, flexor retinaculum

66
Q

Flexor digiti minimi insertion

A

ulnar side of the base of proximal phalanx of 5th digit

67
Q

Flexor digiti minimi nerve

A

Ulnar nerve

68
Q

Flexor digiti minimi function

A

flexes the little finger

Anatomy (17 decks)

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