Posterior Forearm and Hand Flashcards Preview

Anatomy and Radiology - Test 1 > Posterior Forearm and Hand > Flashcards

Flashcards in Posterior Forearm and Hand Deck (58):
1

Posterior compartment of forearm layers

Deep and superficial

2

Most extensors arise from

lateral epicondyle

3

Muscles of superficial layer of posterior

Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum
Extensor carpi ulnaris
Extensor carpi minimi

4

Muslces of deep layer of posterior

Abductor pollicis longus
Extensor pollicis brevis
Extensor pollicis longus
Extensor indices
Supinator

5

All muscles of posterior compartment innervated by the

radial nerve

6

Brachioradialis function and innervation

Flexes forearm
Radial nerve
Crosses anterior to the elbow joint

7

Extensor carpi radialis longus function and innervation

Radial
Extends and abducts wrist

8

Extensor carpi radialis brevis function and innervation

Extends and abducts writst radial

9

Extensor digitorum function and innervation

Extends fingers and wrist
Radial

10

Extensor digiti minimi function and innervation

Extends digit 5 and wrist
Radial

11

Extensor carpi ulnaris function and innervation

Extends and adducts wrist Radial

12

Supinator function and innervation

Supinates forearm
Radial

13

Abductor pollicis longus function and innervation

Radial
Abducts and extends thumb

14

Extensor pollicis longus function and innervation

Extends 1st digit at MCP joint
Radial nerve

15

Extensor indicis function and innervation

Extends digit 2
Radial

16

Extensor expansion

Mostly works on the MCP
Connects extensors of the hand

17

Radial artery forearm location

Deep to brachioradialis

18

Ulnar artery location

Deep to flexor carpi ulnaris

19

Which branch does common intnerosseus artery come from?

Ulnar artery

20

Median nerve innervation and location

Between flexor digitorum superficialis and profundus
Innervates all anterior except flexor carpi ulnaris and medial half of flexor digitorum profundus

21

Ulnar nerve location and innervation

Medial side deep to flexor carpi ulnaris
Innervates flexor carpi ulnairs and medial half of flexor digitorum ulnais

22

Radial nerve location and innervation

Enters between brachioradialis and brachialis
Deep branch supplies all extensors
Superficial has no muscular or cutaneous in the forearm

23

Compartments of hand

Thenar compartment
Hypothenar compartment
Central compartment
Adductor-interosseus compartment

24

Compartments of hand separated by

Fascial septa

25

Central compartment limited by the

Palmar aponeurosis (anterior)
Thenar septum (laterally)
Hypothenar septum (medially)
Palmar interosseus fascia (posteriorly)

26

Palmar aponeurosis

Covers palm between thenar and hypothenar eminences

27

Tendon of palmaris longus inserts into

Palmar aponeurosis

28

Thenar compartment muslces and innervation

Abductor pollicis brevis
Flexor pollicis brevis
Opponens pollicis
Median nerve
Position and move thumb

29

Hypothenar muscles and innervation

Abductor digiti minimi
Flexor digiti minimi
Opponens digiti minimi
Ulnar
Position and move little finger

30

Central compartment muscles and innervations

Lumbricals (medial 2 ulnar nerve, lateral 2 median nerve)
Tendons of flexor digitorum superficialis
Tendons of flexor digitorum profundus

31

Lumbricals

Worm-like muscles that attach tendons of flexor digitorum profundus to the extensor expansions

32

Lumbrical function and innervation

Flex MCP joints and extend IP joints
1 and 2 - median
3 and 4 - ulnar

33

Adductor-interosseus compartment muscles and innervation

Adductor pollicis
Palmar interossei
Dorsal interossei
Ulnar nerve

34

Palmar interossei function

adduction - 2,4,5

35

Dorsal interossei function

Abduction - 2,3,4

36

Adductor pollicis function and innervation

Adducts thumb
Ulnar

37

Dorsum of hand contains

Dorsal tendon compartment for extensor compartment of forearm

38

Extensor retinaculum

Binds tendons to dorsal aspect of the hand

39

Only muscles intrinsic to dorsum of hand

Dorsal interosseus muslces

40

Synovial sheaths

Enclose tendons of the flexors and extensors to reduce friction during movement

41

Flexor retinaculum

Forms carpal tunnel
Attaches carpal bones

42

Digital fibrous sheaths

Fibrous bands superficial to the synovial digital tendon sheaths in the fingers
Prevents bowing of tendons when muscles contract

43

What does carpal tunnel contain

Tendons of flexor digitorum superficialis, flexor digitorum profundus, flexor pollicis longus, and median nerve,

44

Palmaris longus lies

Superficial to flexor retinaculum and ends in palmar aponeurosis

45

Flexor carpi radialis lies

In its own connective tissue sheath

46

Carpal tunnel syndrome

Compresses median nerve
Affects mostly the index and middle fingers

47

Radial and ulnar artery location

Superficial to flexor retinaculum

48

Superficial palmar arch

Formed by anastomosis between ulnar and branch of radial artery

49

Common palmar digital arteries

Originate from superficial palmar arch

50

Proper palmar digital arteries

Branches of common palamr digital arteries and supply sides of 2,3,4,5

51

Deep palmar arch

Formed by anastomsis between branch of ulnar and radial artery

52

Palmar metacarpal arteries

Supplement superficial palmar arteries by anastomosis with common palmar arteries

53

Princeps pollicis

Radial artery branch supplying thumb

54

Radial indeces

Radial artery branch supplying index finger

55

Where is deep arch located toward (radius or ulna)

Radial

56

Anatomical snuff box boundaries

Extensor pollicis longus posteriorly
Extensor pollicis brevis and abductor pollicis longus anteriorly

57

What artery passes through snuff box?

Raidal

58

What forms floor of snuff box?

Scaphoid and trapezium