Hand Flashcards

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1
Q

Dorsum of the skin is innervate by

A

Ulnar nerve and radial nerve

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2
Q

Palmar surface of the skin innervated by

A

Median nerve mostly and ulnar nerve

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3
Q

Carpal arch is formed

A

Laterally by tubercle of trapezium and scaphoid and medically by hook of hammate and pisiform

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4
Q

List carpal bones from lateral to medial

A

Scaphoid, lunnate, triquetium, pisiform for proximal

Trapezium, trapezpid, capitate, hammate for distal

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5
Q

Veinous drainage of dorsum of hand?

A

Cephalic vein

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6
Q

Anatomical snuffbox

A

It is a triangular depression on the posterolateral aspect of the wrist and first metacarpal

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7
Q

Borders of anatomical snuffbox

A

Laterally by APL and EPB
Medial border is EPL
Floor by scaphoid and trapezium and extensor carpus radialis longus and extensor carpus radialis brevis

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8
Q

Contents of anatomical snuffbox

A

Radial artery
Superficial branch of radial nerve
Cephalic vein and dorsal veinoue arch of the hand(in the subcutaneous tissue)

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9
Q

What is the natatory ligament

A

Superficial transverse metacarpal ligament

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10
Q

Chronic damage to palmar apponeurosis resulting in fibrosis and shortening of fibres pulling hand into a FIXED FLEXED POSITION is known as

A

Dupuytren’s contracture

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11
Q

Medial 4 fingers have 2 long tendons in each digital flexor sheath and thumb has 1. What is it?

A

Flexor digitorium profundus, flexor digitorum superficial. Thumbs has flexor pollicis longus

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12
Q

Common flexor sheaths contain

A

The superficial and deep flexor tendons

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13
Q

Common flexor sheath extends about …. cm into the distal part of the forearm

A

2.5

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14
Q

The common flexor sheath is closed on…side and open from… side. What is the clinical importance

A

Closed on medial and open on lateral side
Clinical importance is that infection in little finger and thumb can extend into forearm bc synovial sheath is continuous

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15
Q

Lower segment of cord supply… muscles and higher segment of cord supply… muscles

A

Distal

Proximal

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16
Q

What are the intrinsic muscles of the hand

A
Palmaris brevis
Hypothenar 
Thenar (look more into this
Abductor Pollicis
Lumbricals 
Palmar and dorsal interrosei
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17
Q

All intrinsic muscles are supplied by deep branch of the ulnar nerve except

A

3 thenar muscles and 2 lateral lumbricals innervated my the median nerve

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18
Q

Lumbrical muscles function

A

Extend both interphalangeal joints and flex MCP

19
Q

Nerve supply of lumbroxal muscles

A

Medial two by ulnar nerve and lateral 2 by median nerve

20
Q

Important of lumbrical muscles

A

Orignate from 4FDP tendons if the palm and pass dorsally around the lateral side of each finger’s MCP joints.

21
Q

Dorsal interroseuous muscles action

A

Spread the fingers. Abduct fingers away from midline

22
Q

Nerve supply of dorsal interosseous muscles

A

Deep branch of ulnar nerve

23
Q

Important info on dorsal interroseuous

A

4

Each arise by 2 heads from adjacent metacarpal bones

24
Q

Distribution of palmar interosseous muscles

A

Thumb may or may not have. Middle finger doesn’t have. Index finger medial side, ring finger, little finger

25
Nerve supply of palmar interosseous muscle
Deep branch of ulnar nerve
26
Fascia of the palm continuous with
Antebrachial fascia
27
Palmar aponeurosis is...
Triangular condensation of the deep fascia of the palm. Continues with palmaris longus tendon. Longitudinal bands continuous with this as well
28
The radial artery supplies?
The thumb and the lateral side of the index finger
29
Ulnar artery supplies
The third to fifth digits and the medial side of the index finger
30
Superficiak palmer arch is formed by
Superficiak palmar branches of ulnar and radial arteries. Ulnar more dominant
31
SPA gives rise to ...
3 common palmar digital arteries
32
Common palmar digital arteries give rise to
Proper palmar digital arteries
33
Terminar branches of ulnar nerve
Superficial palmar branch and keep palmar branch11
34
Course of radial artery?
Curves round scaphoid and trapezium | Crosses floor of anatomical snuffbox
35
Radial artery enters the palm by...
Passing between the heads of the 1st dorsal interosseous muscle and the 2 heads of adductor pollicis
36
Deep palmar arch is...to superficial palmar arch
Proximal
37
Branches of the radial artery
First carpal branch First dorsal metacarpal artery Princess pollicis artery Radialis indicis artery
38
Branches of deep palmar arch
3 palmar metacarpal arteries | Perforating branches
39
Veins of the hand are drained by the
Cephalic and basilic vein. Basilic vein on the medial side
40
Median nerve innervates?
Skin on the lateral three and one half digits and skin and of the dorsal aspect of the phalanges of the same digits. Thenar muscles 2 lateral lumbricals
41
Ulnar nerve enters hand anterior to
Flexor reticulum
42
Superficial branch of ulnar nerve supplies?
Palmaris brevis and skin of the palmar surface of the 5th and medial half of the 4th digit
43
Superficial branch of radial nerve supplies?
The skin of the dostum of the lateral 3 and half digits proximal to terminal interphalangeal digits