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SHB > Hand > Flashcards

Hand Flashcards

1
Q

What can you find under skin on dorsal side of hand?

A

Superficial radial nerve, dorsal branch ulnar nerve, dorsal interossei

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2
Q

Wrist Bones

A

So Long to Pinky,
Here comes the thumb

Palmar View

Proximal: Scaphoid, Lunate, Triquetrum, Pisiform
Distal: Hamate, Capitate, Trapezium, Trapezoid

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3
Q

Most common hand fracture?

A

Scaphoid: falls on base of palm forcing capitate into scaphoid.

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4
Q

Only two wrist bones to articulate with radius?

A

Scaphoid and lunate

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5
Q

Metacarpals

A

5 bones numbered from lateral - medial

Common characteristics: base articulates with the carpal bones; linear shaft; rounded head

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6
Q

Phalanges

A

14 bones
2 in thumb (proximal and distal)
3 in digits 2 to 5 (proximal, middle, and distal)
Each bone has a base (proximal), shaft and head (distal)

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7
Q

What cutaneous regions does the median nerve inervate in hand?

A

Palmar: Thumb, first 2.5 fingers
Dorsal: tips of same fingers

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8
Q

What cutaneous regions does the ulnar nerve inervate in hand?

A

Palmar: last 1.5 fingers
Dorsal: Same area plus first half of middle finger

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9
Q

What cutaneous regions does the radian nerve inervate in hand?

A

Dorsal: Thumb to middle finger but only halfway up fingers

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10
Q

Dermatomes in hand

A

C6 - Thumb
C7 - 2 -3
C8 - 4-5

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11
Q

Palmar Aponeurosis

A

Thick layer of fascia in palm of hand attached to palmaris longus

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12
Q

Dupuytren’s Contracture

A

Progressive fibrosus producing abnormal bands of fibrous tissue from aponeurosis to bases of phalanges, pulling digits into marked flexion. Cannot open hand completely.

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13
Q

Synovial Sheaths

A

Go around tendons to help slide through hand. Flexor digitorum sheath: escases profundus and superficialis

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14
Q

Borders of Carpal Tunnel

A

Posterior: carpal bones.
Anterior: flexor retinaculum.

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15
Q

Contents of Carpal tunnel

A

Flexor digitorum superficialis (4 tendons)
Flexor digitorum profundus (4 tendons)
Flexor pollicis longus
Median Nerve

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16
Q

Causes of carpal tunnel syndrome

A

Fluid retention
Infection
Excessive exercise

17
Q

Effects of Carpal Tunnel syndrome

A

Thenar wasting, sensory loss

18
Q

What are the Thenar muscles?

A

“OAF”
Oponens policis
Abductor policis brevis
Flexor Policis Brevis
Innervated by recurrent median nerve in thumb side
Innervated by recurrent Ulna nerve in pinky side

19
Q

Lumbricals

A

Flex the hand while extending proximal and distal interphalangeal joints

20
Q

What inervates lumbricals?

A

1-2 median, 3-4 ulnar

21
Q

Where do lumbricals originate?

A

Profundus tendon

22
Q

Extensor Expansion

A

Common “hood” which aids in extension of fingers

Receives extensor digitorum, interossei, and lumbrical tendons.

23
Q

Dorsal Interossei

A

Go between bones on dorsal and Palmar Group
Dorsal: DABS - Dorsal ABdcut (4 of them, 4 letters) move fingers away from midline
Palmar: PAD (3) ADDuct (3 letters) move fingers back to midline

24
Q

Ulnar or radial artery deep in hand?

A

USRD

Radial deep

25
Q

What fingers does only radial a. supply

A

Thumb and lateral side of index

26
Q

Which artery is in canal of Guyon?

A

Ulnar

27
Q

What does median nerve inervate in hand?

A 
1/2 LOAF
1-2Lumbercals
Oponens policis
Abductor policis brevis
Flexor Policis Brevis
ALL OTHER MUSCLES IN HAND DONE BY ULNAR NERVE
28
Q

Most dommonely dislocated bond in wrist?

A

Lunate

29
Q

Why is adduction spared in carpal tunnel?

A

Adductor policis is inervated by the ulnar nerve

30
Q

OAF Iintrinsic or extrinsic?

A

Intrinsic

31
Q

What side of digits to lumbricals insert on?

A

Lateral

32
Q

Ulnar artery branches in hand

A

Superficial Palmar Arch - Anastamose swith superficial branch of radial artery.
Deep branch - Passes between abductor digiti minimi and flexor digiti minimi
Anastomoses with deep palmar arch

33
Q

Radial artery branches in hand

A

Superficial Palmar – branches off radial before wraps around the lateral carpals, passes through thenar muscles to anastamose with superficial palmar arch.
Deep Palmar Arch - Continues through palm as the deep palmar arch, anastamosing with deep branch of ulnar a.

34
Q

Venous return from fingers

A

Follows superficial palmar arch to ulnar vein.

35
Q
  1. Deep venous arcades
A

Follow deep palmer arch to radial vein.

36
Q

Does Entire median nerve go through carpal tunnel?

A

Palmar cutaneous branch does not! Provides feeling to skin

37
Q

Lumbricals below or on top of interosseous?

A

On top - palmar side

SHB (23 decks)

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