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Anatomy > Lecture 13: Hand > Flashcards

Lecture 13: Hand Flashcards

1
Q

Palmar cutaneous branch of median supplies, arises, passes

A

Supplies central palm
Arises proximal to the flexor retinaculum
Passes superficial to flexor retinaculum

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2
Q

Palmar cutaneous branch of ulnar nerve supplies, arises, passes

A

Supplies medial side of palm
Arises proximal to wrist
Passes superficial to flexor retinaculum and palmar aponeurosis

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3
Q

Venous drainage of dorsum of hand

A

Dorsal venous arch medially drains into basilic, laterally drains into cephalic

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4
Q

Extensor indicis blood supply/innervation

A

BS- Posterior interosseous and perforating branch of anterior interosseous
I-Posterior interosseous

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5
Q

Superficial branch of ulnar nerve branches to

A

Muscular branch to palmaris brevis
Cutaneous branch to palmar aspect of ulnar side of little finger and adjacent sides of little and ring fingers, including tips and dorsum

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6
Q

Flexor pollicis brevis attachments

A

P- Flexor retinaculum and tubercles of scaphoid and trapezium
D- Lateral side of base of proximal phalanx of thumb

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7
Q

Medial branch of median nerve

A

To second lumbrical

cutaneous to adjacent sides of digits 2-4, including nailbed and fingertips

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8
Q

Opponens digiti blood supply/innervation

A

BS- Ulnar artery

I- Deep branch of ulnar nerve

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9
Q

Metacarpophalangeal joints vascularization

A

Deep digital arteries from superficial palmar arches

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10
Q

Abductor pollicis brevis attachments

A

P- Flexor retinaculum and tubercles of scaphoid and trapezium
D- Lateral side of base of proximal phalanx of thumb

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11
Q

Contents of carpal tunnel

A

Long flexor tendons of-
Flexor digitorum superficialis and profundus
Flexor pollicis longus
Median nerve

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12
Q

Lumbricals Distal attachments and function

A

They insert on lateral sides of the extensor expansions of digits 2-5
They flex the metacarpophalangeal joints and extend interphalangeal joints of digits 2-5

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13
Q

Palmar aponeurosis

A

Triangular layer of deep fascia between two eminences

Anchored to skin and flexor retinaculum

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14
Q

Ulnar nerve enters hand

A

Superficial to the flexor retinaculum

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15
Q

PAD (Palmar interossei) description

A

Four (three) unipennate muscles
-First is sometimes considered to be part of flexor pollicis brevis
Supply each digit except third- reference is middle finger

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16
Q

Extensor expansion function

A

Flexion at MCP joint

Extension at PIP, DIP joints

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17
Q

DAB (Dorsal interossei) description, attachments, action, innervation

A

Four bipennate muscles
Arise via two heads from adjacent sides of two metacarpals
Insert onto extensor expansions and radial sides of proximal phalanges 2/3, ulnar sides of proximal phalanges 3/4
Digit 3 has 2 dorsal interossei
Abduct MP joints of digits 2-4, reference line is middle finger
Ulnar nerve

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18
Q

Carpometacarpal joint vascularization

A

Dorsal/palmar carpal arch anastomoses, deep palmar arch

Metacarpal arteries

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19
Q

Metacarpophalangeal joint innervation

A

Digital nerves from ulnar/median nerves

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20
Q

PAD insertion
Action
Innervation

A

Onto ulnar sides of proximal phalanges 1 and 2
Onto radial sides of proximal phalanges 4 and 5
Adduct MP joints of digits 1,2,4,5
Ulnar nerve

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21
Q

Palmaris brevis origin, insertion, action

A

Origin: flexor retinaculum and palmar aponeurosis
Insertion: skin on medial side of palm
Action: tenses skin on palm

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22
Q

Colles fracture

A

Fracture in distal end of radius

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23
Q

Flexor digiti minimi actions

A

Flexes proximal phalanx of 5th digit

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24
Q

Function notes extensor expansion

A

Extension at the PIP is always accompanied by simultaneous extension at the DIO
When the PIP is flexed, the DIP may be extended or flexed

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25
Q

Midpalmar space

A

Located between metacarpals 4&5 and the long flexor tendons to digits 4&5

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26
Q

Guyons canal formed by, what passes through

A

Formed by a groove between the pisiform and the hook of hamate
Ulnar nerve and artery pass through

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27
Q

Third and fourth lumbricals origin, innervation, blood supply

A

Attached to medial 3 tendons of FDP
Deep branch of ulnar nerve
Superficial palmar arch(ulnar a), dorsal carpal arch (ulnar and radial artery)

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28
Q

Innervation of thenar eminence muscles

A

Recurrent branch of median nerve

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29
Q

Dupuytrens contracture

A

Progressive fibrosis of palmar aponeurosis

Results in marked flexion of fingers at MP joints

30
Q

Lumbricals innervation, action

A

Two on radial side- median nerve
Two on ulnar side- ulnar nerve
Flex MCP joints and extend IP joints

31
Q

Adductor pollicis blood supply/innervation

A

BS- Radial artery

I- Deep branch of the ulnar nerve

32
Q

Abductor pollicis brevis actions

A

Abducts thumb, aids in opposition

33
Q

Abductor digiti minimi attachments

A

P- Pisiform

D-Medial side of base of proximal phalanx of 5th digit

34
Q

Flexor digiti minimi brevis attachments

A

P- Hook of hamate and flexor retinaculum

D- Medial side of base of proximal phalanx of 5th digit

35
Q

Adductor pollicis actions

A

Adducts thumb toward lateral border of palm

36
Q

Carpometacarpal joints motion

A

Almost none 2-3
Limited for 4
More mobile for 5- flexion/extension, abd/add, circumduction, opposition

37
Q

Flexor retinaculum

A

Laterally attaches to tubercles of scaphoid and trapezium

Medially attaches to hook of hamate and pisiform

38
Q

Arterial supply to dorsum of hand

A

Via dorsal arterial arch from radial & ulnar arteries

39
Q

Mallet finger

A

Avulsion by long extensor tendon, results in hyperflexion of DIP

40
Q

Ulnar nerve injury

A

Paralysis and atrophy of interosseous muscles
Loss of thumb adduction
Clawhand

41
Q

Lymphatic drainage of dorsum of hand

A

Medial via lymph vessel accompanying basilic vein to supratrochlear nodes to lateral axillary nodes

42
Q

Lateral branch of median nerve

A

To thenar muscles and first lumbrical

Cutaneous to anterior surface of thumb and radial side of index finger

43
Q

Opponens digiti minimi actions

A

Brings 5th metacarpal anterior and rotates it to bring it to opposition with the thumb

44
Q

Carpometacarpal joint innervation

A

Anterior interosseous-median
Posterior interosseous-radial
Dorsal/deep branches ulnar nerve

45
Q

Flexor digitorum superficialis action, tendons characteristics and insertion

A

Flexes PIP and MCP and wrist
Each tendon passes through fibrous flexor sheath
Each tendon bifurcates opposite proximal phalanx
Each tendon inserts on middle phalanx

46
Q

Opponens digiti minimi attachments

A

P- Hook of hamate and flexor retinaculum

D- Medial border of 5th metacarpus

47
Q

Opponens pollicis actions

A

Oppose thumb and medially rotate first metacarpal

48
Q

Opponens pollicis proximal/distal attachments

A

P-Flexor retinaculum and tubercles of scaphoid and trapezius

D-Lateral side of 1st metacarpal

49
Q

Abductor digiti minimi actions

A

Abducts 5th digit, aids in flexion of 5th proximal phalanx

50
Q

Vinculae

A

Small vascular bundles connecting palmar surface of phalanges with long flexor tendons

51
Q

Median nerve injury

A

Loss of thumb opposition
Atrophy of thenar muscles
Ape hand

52
Q

Flexor pollicis brevis actions

A

Flexes thumb

53
Q

Opponens pollicis blood supply/innervation

A

BS- Radial artery

I- Recurrent branch of median nerve

54
Q

Clinical notes extensor expansion

A

If lateral bands detach lateral bands will flex the PIP and hyperextend the DIP
Look at this more

55
Q

Flexor digiti minimi blood supply/innervation

A

BS- Ulnar artery

I- Deep branch of ulnar nerve

56
Q

Median nerve enters hand

A

Deep to flexor retinaculum, divides into lateral and medial branches

57
Q

Flexor digitorum profundus action, insertion

A

Flexes DIP and PIP and MCP
More active than superficialis
Each tendon inserts on distal phalanx

58
Q

Route of radial artery

A

Passes proximally deep to brachioradialis
Distally lies against radius lateral to tendon of flexor carpi radialis
Passes across scaphoid in anatomical snuff box
Wraps around dorsum of metacarpus one-gives off arteries to thumb/index finger
Pierces first dorsal interosseous muscle and reappears in palm
Forms deep palmar arch

59
Q

Extensor expansion lateral/central band attachment

A

Lateral- Bases of distal phalanges

Central- Base of middle phalanx

60
Q

First and second lumbricals origin, innervation, blood supply

A 
Attached to lateral 2 tendons of FDP
Median nerve
Radialis indicis (radial), superficial palmar arch (ulnar)
61
Q

Extensor indicis proximal/distal attachment

A

P-Posterior surface of distal 1/3 of ulna and interosseous membrane
D- Extensor expansion of index finger

62
Q

Abductor pollicis brevis blood supply/innervation

A

BS- Radial artery

I- Recurrent branch of median nerve

63
Q

Deep branch of ulnar nerve

A

Supplies hypothenar muscles, all interossei, two ulnar side lumbricals and adductor pollicis

64
Q

Lumbricals description, origin

A

Four small, narrow, elongated muscles

Each arises from the radial side of a flexor digitorum profundus tendon

65
Q

Hypothenar eminence muscles and their innervation

A

Abductor digiti minimi
Flexor digiti minimi brevis
Opponens digit minimi
Ulnar nerve innervates

66
Q

Abductor digiti minimi blood supply/innervation

A

BS- Ulnar artery

I-Deep branch of ulnar nerve

67
Q

Muscles of thenar eminence

A

Abductor pollicis brevis
Flexor pollicis brevis
Opponens pollicis

68
Q

Adductor pollicis attachments

A

P- Bases of 2nd/3rd metacarpals, capitite, and adjacent carpals
D- Medial side of base of proximal phalanx of thumb

69
Q

Thenar space

A

Located between palmar side of adductor pollicis and the long flexor tendons to the index finger and thumb

70
Q

Extensor indicis actions

A

Independent extension of index finger, helps with extension of wrist

71
Q

Flexor pollicis brevis blood supply/innervation

A

BS- Radial artery

I- Recurrent branch of median nerve, deep branch of ulnar nerve

Anatomy (34 decks)

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