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

Posterior Forearm and Hand Flashcards

1
Q

Posterior compartment of forearm layers

A

Deep and superficial

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2
Q

Most extensors arise from

A

lateral epicondyle

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3
Q

Muscles of superficial layer of posterior

A 
Brachioradialis 
Extensor carpi radialis longus 
Extensor carpi radialis brevis 
Extensor digitorum
Extensor carpi ulnaris 
Extensor carpi minimi
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4
Q

Muslces of deep layer of posterior

A 
Abductor pollicis longus
Extensor pollicis brevis
Extensor pollicis longus
Extensor indices
Supinator
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5
Q

All muscles of posterior compartment innervated by the

A

radial nerve

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6
Q

Brachioradialis function and innervation

A

Flexes forearm
Radial nerve
Crosses anterior to the elbow joint

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7
Q

Extensor carpi radialis longus function and innervation

A

Radial

Extends and abducts wrist

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8
Q

Extensor carpi radialis brevis function and innervation

A

Extends and abducts writst radial

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9
Q

Extensor digitorum function and innervation

A

Extends fingers and wrist

Radial

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10
Q

Extensor digiti minimi function and innervation

A

Extends digit 5 and wrist

Radial

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11
Q

Extensor carpi ulnaris function and innervation

A

Extends and adducts wrist Radial

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12
Q

Supinator function and innervation

A

Supinates forearm

Radial

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13
Q

Abductor pollicis longus function and innervation

A

Radial

Abducts and extends thumb

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14
Q

Extensor pollicis longus function and innervation

A

Extends 1st digit at MCP joint

Radial nerve

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15
Q

Extensor indicis function and innervation

A

Extends digit 2

Radial

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16
Q

Extensor expansion

A

Mostly works on the MCP

Connects extensors of the hand

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17
Q

Radial artery forearm location

A

Deep to brachioradialis

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18
Q

Ulnar artery location

A

Deep to flexor carpi ulnaris

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19
Q

Which branch does common intnerosseus artery come from?

A

Ulnar artery

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20
Q

Median nerve innervation and location

A

Between flexor digitorum superficialis and profundus

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

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21
Q

Ulnar nerve location and innervation

A

Medial side deep to flexor carpi ulnaris

Innervates flexor carpi ulnairs and medial half of flexor digitorum ulnais

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22
Q

Radial nerve location and innervation

A

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

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23
Q

Compartments of hand

A

Thenar compartment
Hypothenar compartment
Central compartment
Adductor-interosseus compartment

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24
Q

Compartments of hand separated by

A

Fascial septa

25
Q

Central compartment limited by the

A 
Palmar aponeurosis (anterior)
Thenar septum (laterally)
Hypothenar septum (medially)
Palmar interosseus fascia (posteriorly)
26
Q

Palmar aponeurosis

A

Covers palm between thenar and hypothenar eminences

27
Q

Tendon of palmaris longus inserts into

A

Palmar aponeurosis

28
Q

Thenar compartment muslces and innervation

A 
Abductor pollicis brevis
Flexor pollicis brevis 
Opponens pollicis 
Median nerve 
Position and move thumb
29
Q

Hypothenar muscles and innervation

A 
Abductor digiti minimi
Flexor digiti minimi
Opponens digiti minimi
Ulnar 
Position and move little finger
30
Q

Central compartment muscles and innervations

A

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

31
Q

Lumbricals

A

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

32
Q

Lumbrical function and innervation

A

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

33
Q

Adductor-interosseus compartment muscles and innervation

A

Adductor pollicis
Palmar interossei
Dorsal interossei
Ulnar nerve

34
Q

Palmar interossei function

A

adduction - 2,4,5

35
Q

Dorsal interossei function

A

Abduction - 2,3,4

36
Q

Adductor pollicis function and innervation

A

Adducts thumb

Ulnar

37
Q

Dorsum of hand contains

A

Dorsal tendon compartment for extensor compartment of forearm

38
Q

Extensor retinaculum

A

Binds tendons to dorsal aspect of the hand

39
Q

Only muscles intrinsic to dorsum of hand

A

Dorsal interosseus muslces

40
Q

Synovial sheaths

A

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

41
Q

Flexor retinaculum

A

Forms carpal tunnel

Attaches carpal bones

42
Q

Digital fibrous sheaths

A

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

43
Q

What does carpal tunnel contain

A

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

44
Q

Palmaris longus lies

A

Superficial to flexor retinaculum and ends in palmar aponeurosis

45
Q

Flexor carpi radialis lies

A

In its own connective tissue sheath

46
Q

Carpal tunnel syndrome

A

Compresses median nerve

Affects mostly the index and middle fingers

47
Q

Radial and ulnar artery location

A

Superficial to flexor retinaculum

48
Q

Superficial palmar arch

A

Formed by anastomosis between ulnar and branch of radial artery

49
Q

Common palmar digital arteries

A

Originate from superficial palmar arch

50
Q

Proper palmar digital arteries

A

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

51
Q

Deep palmar arch

A

Formed by anastomsis between branch of ulnar and radial artery

52
Q

Palmar metacarpal arteries

A

Supplement superficial palmar arteries by anastomosis with common palmar arteries

53
Q

Princeps pollicis

A

Radial artery branch supplying thumb

54
Q

Radial indeces

A

Radial artery branch supplying index finger

55
Q

Where is deep arch located toward (radius or ulna)

A

Radial

56
Q

Anatomical snuff box boundaries

A

Extensor pollicis longus posteriorly

Extensor pollicis brevis and abductor pollicis longus anteriorly

57
Q

What artery passes through snuff box?

A

Raidal

58
Q

What forms floor of snuff box?

A

Scaphoid and trapezium

Anatomy and Radiology - Test 1 (21 decks)

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