lecture 5 (elbow, wrist, hand)

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created 4 weeks ago by obhill
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need to do this whole lecture and pics for it too
updated 4 weeks ago by obhill
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1

where does the bicep run

from scapula to the forearm fascia.

2

forearm flexers

biceps

brachialis

brachioradialis

pronator teres

3

forearm extenders

triceps

aconeus

4

forearm supinators

biceps

supinator

5

forearm pronators

pronator teres

pronator quadratus

6

when does the biceps flex the forearm?

when supine

7

what are two additional actions of the biceps besides supination and flexion of forearm?

the SHORT HEAD resists shoulder dislocation

aBducts the shoulder horizontally

8

additional actions of the triceps

LONG HEAD resists humerus dislocation

9

when is the triceps especially important

during aDduction

10

whose flexion is relatively weak

brachioradialis

11

when is the brachioradialis's flexion at a max?

when forearm is in mid pronated position

12

anconeus additional actions

may aBduct ulna during pronation

stabilizes the elbow joint

13

where does the pronator teres flex the forearm?

at the elbow

14

what muscle's deep fibers bind the radius and ulna together?

the pronator quadratus

15

where is he brachialis located

anterior humerus (distal half) to coronoid process

Deep to biceps

16

what heads does the triceps have?

lateral (superior to radial groove) and long

17

where is he brachialis located

anterior humerus (distal half) to coronoid process

18

where is the brachioradialis located

anterior humerus, thumb side

19

where is aconeus located

right over the elbow olecranon to the top of the ulna

20

where is the pronator teres located

its like diagonal from the coronoid process of ulna to the radius, top half of forearm.. it also attaches to medial epicondyle Bc hand flexor

21

where is the supinator located

thumb side, medial epicondyle to the top of the bottom of the pronator teres, touches the middle of pronator teres too

22

Superficial flexors of the hand AT the wrist (4)

Pronator teres, flexor Capri radialis, palmaris longus, flexor carpi ulnaris

23

Intermediate group of the flexors of the hand

Flexor digitorum superficialis

24

Deep, third layer of flexors of the hand

Flexor digitorum profundus and flexor pollicis longus and , pronator quadratus

25

What muscles have a proximal attachment of medial epicondyle of humerus?

The superficial flexors of the hand: pronator teres humeral head, flexor carpi radialis, flexor carpi ulnaris, and palmaris longus

26

What muscle tenses the palmar aponeurosis?

Palmaris longus

27

What abduct the hand at wrist

Flexor carpi radialis, extensor carpi radialis longus and brevis,

28

What adduct the hand at the wrist

Extensor carpi ulnaris, flexor carpi ulnaris

29

Additional attachments beyond the common flexor origin

While the flexor carpi ulnaris and pronator teres' humeral heads are proximally attached at the medial epicondyle of the humerus, they also have ulnar heads that are diff: Coronoid/olecrannon

30

ligaments of the elbow (3)

radial collateral

ulnar collateral

anular

31

aponeurosis

a sheet of pearly white fibrous tissue taking the place of a tendon in flat muscles w/ a wide area of attachment

32

where does the musculocutaneous nerve end?

in the arm, and goes on as lateral cutaneous in forearm

33

where does the radial nerve go from and to?

back of the arm to the anterior lateral forearm

34

what two nerves have no branches

median and ulnar

35

where does the median nerve travel

anterior w brachial artery

36

antibrachial

forearm

37

when does the brachial artery begin

what does it supply

what nerve does it accompany

after teres major.

supplies anterior muscles

median

38

what does profunda brachii supply?

where does it end?

what nerve does it accompany?

posterior muscles

ends in the arm

accompanies radial nerve

39

what arm arteries provide extra supply

collaterals

40

annular ligament

circles head of radius, dosnt really attach, but allows it to rotate

41

when can the supinator supinate?

if the elbow is flexed

42

metacarpus means

palm

43

what joint is the wrist

radio-carpal

44

aBduction of the thumb is also called

radial deviation

45

aDduction of the pinky is also called

ulnar deviation

46

distal radio-ulnar joint

head of ulna and ulnar notch of radius

47

head of ulna: elbow or wrist?

near wrist

48

radial collateral ligament attachment

attached to radial styloid process and scaphoid

49

ulnar collateral ligament

attached to ulnar styloid process and triquetrum

50

flexor and extensor retinaculum

fibrous band, strap, or ligament that holds another part in place

so, not a tendon

51

pneumonic for anterior view of carpal bones

Straight Line To Pinky, Here Comes The Thumb

(Scaphoid, Lunate, Triquetrum, Pisiform, Hook of Hamate, Capitate, Trapezoid, Trapezium and Tubercle)

(the back is same if u can find the scaphoid, but no pisiform on back. also, hamate is not a hook!)

also notice that the trapezium and trapezoid are thumb side.

52

phalangeal movements:

MCP

flexion/ext

aB/aDduction

circumduction

53

PIP/DIP joint movements

flex/extension

54

actions of BOTH HEADS of the FDS

middle four digit flexion at PIP joints

stronger action: flexes proximal phalanges at MCP joints

55

things left to do:

check what notecard additions are needed for prev. lectures (what I checked on trip)

learn where the thumb muscles are

make notecards from my notes

finish handout 3 and 4 and nerve chart and whats left of muscle chart

and review everything else. esp. forearm placement of muscles

slide 80 onward from elbow/wrist lecture

...

56

FDP actions: medial part

DIP joints flexion phalanges 4 and 5

the deep muscle flexes the d istal ip joints

57

FDP actions: lateral part

DIP joint flexion 2 and 3

58

FPL action

flexes thumb phalanges

59

forearm and hand muscles w/ multiple heads (6)

pronator teres (ulnar and humeral)

flexor carpi ulnaris (ulnar and humeral)

flexor digitorum superficialis (humero-ulnar and radial head)

flexor digitorum profundus (medial and lateral)

flexor pollicis brevis (superficial and deep heads)

aDductor pollicis (oblique and transverse head)

60

no longus and brevis for the forearm flexor muscles btw!

...

61

when is brachioradialis's flexion at a max

when forearm is in midpronated position

62

what muscle is active during fist clenching

the extensor carpi radialis longus

63

action of the extensor digitorum

extends medial 4 digits primarily at MCP joints, secondarily at IP joints

note: extensor digiti minimi is same but for pinky (5th digit)

64

what is the common extensor origin:

and what 5 muscles originate there?

lateral epicondyle of humerus

extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi and extensor carpi ulnaris and supinator

65

extensor carpi ulnaris unique origin

not only lateral epicondyle of humerus, but also the posterior ulna w aponeurosis

66

supinator unique origin

not only the lateral epicondyle of humerus, but also the radial collateral and anular ligaments and supinator fossa and ulnar crest

67

aBductor pollicis longus actions

aBduct AND extend thumb at carpometacarpal joint

68

extendor indicis actions

extends second digit and helps extend hand at wrist

69

EPL actions

extends distal phalynx of thumb

extends MCP and carpometacarpal joints

70

Extensor pollicis brevis actions

extends proximal phalynx of thumb at MCP joint, and extends capometacrapal joints

71

actions of the aBductor pollicis brevis

aBducts and helps oppose thumb

72

flexor pollicis brevis actions of BOTH heads

flexes thumb

73

aDductor pollicis action of BOTH heads

aDducts thumb

74

aBductor digiti minimi actions

aBducts 5th digit AND assists in flexion of proximal phalynx

75

flexor digiti minimi action

flexes proximal phalynx of 5th digit

76

opponens digiti action

draws 5th metacarpal anterior and rotates it... bringing 5th digit into opposition w thumb

77

actions of all lumbricals

flex MCP joints and extend IP joints of 2nd-5th digits

78

dorsal interossei, 1st-4th action

aBduct 2nd-4th from axial line and act w lumbricals

79

palmar interossei, 1st-3rd

aDduct 2nd, 4th, and 5th digits toward axial line... assist lumbricals