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ECS 1 final > UQ muscle actions > Flashcards

UQ muscle actions Flashcards

1
Q

Pectoralis major - Clavicular

A

shoulder flexion, MR, horizontal adduction of humerus toward opposite shoulder

Origin fixed: humeral adduction and MR
Insertion fixed: assists in elevation of thorax in forced inspiration

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2
Q

Pectoralis major - Sternal fibers

A

depress shoulder girdle by virtue of attachment of the humerus and obliquely adduct the humerus toward opposite iliac crest

origin fixed: humeral adduction and MR
insertion fixed: assists in elevation of thorax in forced inspiration

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3
Q

Pectoralis minor

A

origin fixed: tilts scapula anteriorly
insertion fixed: assist in forced inspiration

may help with downward rotation of the scapula or at least prevents upward rotation. also internally rotates the scapula

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4
Q

Subclavius

A

draws the clavical down and stabilizes joint

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5
Q

latissimus dorsi

A

origin fixed: shoulder MR, adduction and extension.
insertion fixed: assists in anterior and lateral pelvic tilts, assists in lumbar hyperextension

depresses shoulder girdle, assists in lateral flexion

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6
Q

teres major

A

shoulder MR, add, ext; scapular internal rotation

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7
Q

Serratus Anterior

A

origin fixed: abducts and upwardly rotates scapula. Holds medial border of scapula firmly against the rib cage. Lower fibers may depress the scapula and upper fibers may elevate

Serratus anterior is the best scapular upward rotator and posterior tilter. Serratus also helps externally rotate scapula

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8
Q

supraspinatus

A

abduct shoulder, stabilizes head of humerus in glenoid cavity during movements, may assist with shoulder LR from neutral to full LR

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9
Q

Infraspinatus

A

LR shoulder, stabilizes head of humerus in glenoid cavity during movements, scapular internal rotation

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10
Q

subscapularis

A

MR shoulder, stabilizes head of humerus in glenoid cavity during movements, prevents humeral anterior glide

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11
Q

anterior deltoid

A

shoulder flexion, abduction, and MR

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12
Q

middle deltoid

A

shoulder abduction; scapular downward rotation

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13
Q

posterior deltoid

A

shoulder extension, abduction, and LR; scapular internal rotation

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14
Q

upper trapezius

A

elevate and upwardly rotate scapula; extend neck

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15
Q

middle trapezius

A

adduct (retract) scapula

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16
Q

lower trapezius

A

depress and help upper fibers upwardly rotate scapula

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17
Q

levator scapulae

A

elevates medial border of scapula while downwardly rotating lateral angle; helps rhomboids and trapezius pull scapula upward and medially; bends neck laterally

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18
Q

rhomboid major

A

adducts, elevates, downwardly rotates scapula

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19
Q

rhomboid minor

A

adduct, elevate scapula; rotate scapula so that glenoid cavity faces caudally

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20
Q

teres minor

A

LR shoulder; stabilizes head of humerus in glenoid cavity during movements; scapular internal rotation

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21
Q

pronator teres

A

pronate forearm, assists in elbow flexion

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22
Q

flexor carpi radialis

A

abduct, flex wrist; assists in forearm pronation and elbow flexion

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23
Q

palmaris longus

A

tenses palmar fascia, flex wrist, assists in elbow flexion

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24
Q

flexor digitorum superficialis

A

flexion of PIP of 2nd-5th digits; assist in MCP joint flex and wrist flex

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25
Q

flexor digitorum profundus

A

flexes DIP of index, middle, ring, and little fingers. Assists in PIP, MCP, and wrist flexion

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26
Q

flexor pollicis longus

A

thumb IP flexion; assists in MCP and CMC flex and wrist flexion

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27
Q

flexor pollicis brevis

A

flex MCP, CMC of thumb

assists in opposition, may extend IP joint

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28
Q

pronator quadratus

A

pronate forearm

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29
Q

abductor pollicis brevis

A

palmar abduction of thumb, CMC and MCP joints; extend thumb IP joint. Assists in opposition and flexion, MR of CMC jt

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30
Q

opponens pollicis

A

opposes thumb CMC

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31
Q

Lumbricals

A

extends IP joint and simultaneously flex MCP joints of 2-5th digits; extend IP joints with MCP extended

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32
Q

flexor carpi ulnaris

A

flex, ulnarly deviate wrist; assists in flex of elbow

33
Q

abductor digiti minimi

A

abduct small finger MP joint; assists in opposition and flexion of CMC of 5th digit and assists in extension of IP joint

34
Q

flexor digiti minimi

A

flex MCP joint of little finger; assists in opposition

35
Q

opponens digiti minimi

A

opoposes 5th CMC joint

36
Q

interossei

A

dorsal: abduct
palmar: adduct

37
Q

adductor pollicis

A

adduct CMC and adduct/assists in flexion of MCP joint of thumb, assists in thumb opposition and ext IP joint

38
Q

triceps brachii

A

extend elbow

long head: assists in adduction and extension of shoulder

39
Q

anconeus

A

extend elbow, stabilize ulna during pronationa nd supination

40
Q

brachioradialis

A

elbow flexion; assits in pronation and supination of forearm

41
Q

extensor carpi radialis longus

A

extensor, radially deviates wrist, assits in elbow flexion

42
Q

extensor carpi radialis brevis

A

extensor wrist, assist in radial deviation

43
Q

extensor digitorum

A

extend MCP joint and in conjunction with lumbricals and interossei, extend IP joints of 2-5th digits
assist in abducting index, ring, little finger
extend and radial deviate wrist

44
Q

extensor digiti minimi

A

extend MCP join and in conjunction with lumbricals and interossei, extend IP joints of little finger; assist in abduction of little finger

45
Q

extensor carpi ulnaris

A

extend and ulnarly deviate wrist

46
Q

extensor indicis

A

extend MCP joint and extend IP joint of index finger; assits in adduction of index finger

47
Q

abductor pollicis longus

A

extend CMC joint of thumb with slight abduction; wrist radial deviation; assists wrist flexion

48
Q

extensor pollicis longus

A

extend IP joint; assists thumb MCP and CMC exten, assists wrist radial deviation and extension

49
Q

extensor pollicis brevis

A

extend thumb MCP joint, extend and abduct CMC joint, assists in radial deviation

50
Q

Supinator

A

supinate forearm

51
Q

coracobrachialis

A

flex and adduct shoulder

52
Q

biceps brachii

A

flex shoulder (weakly); flex and supinate forearm at the elbow

53
Q

brachialis

A

elbow flexion

54
Q

external oblique

A

flexes, rotates, and laterally flexes vertebral column; compresses abdomen

55
Q

internal oblique

A

flexes, rotates, and laterally flexes vertebral column; compresses abdomen

56
Q

rectus abdominis

A

flexes vertebral column, compresses abdomen

57
Q

masseter

A

elevates the mandible, small effect on side to side movement, protraction, and retraction
pulls mouth closed

58
Q

temporalis

A

elevates mandible (closes the jaw); posterior fibers retrude mandible; assists with alteral deviation

59
Q

medial pterygoid

A

elevation (closes the jaw), protrusion, deviation to opposite side

60
Q

rectus capitis anterior

A

anterior flexion of head on neck (nodding)

ipsilateral rotation

61
Q

rectus capitis posterior major

A

extend head, turns face to same side

62
Q

rectus capitis posterior minor

A

extend, rotate neck

63
Q

oblique capitis inferior

A

rotate head to same side

64
Q

oblique capitis superior

A

extend head, lateral flexion to same side

65
Q

rectus capitis lateralis

A

lateral flexion of head to same side

66
Q

scalene anterior

A

flex lower cervical vert and lat bending; elevate 1st rib

67
Q

scalene medius

A

lat bend of c-spine, elevates rib 1

68
Q

scalene posterior

A

lat bend of c spine, elevates rib 2

69
Q

platysma

A

flex neck

70
Q

orbicularis oculi

A

close eyelids

71
Q

frontalis

A

raise eyebrows

72
Q

orbicularis oris

A

close lips and protrude forward (whistle/kiss)

73
Q

zygomaticus major

A

draw up angles of mouth (smile)

74
Q

mentalis

A

raises and protrudes the lower lip and wrinkle skin of the chin, as in pouting

75
Q

levator anguli oris

A

draw angle of mouth straight upward, deepening the furrow from the side of the nose to the side of the mouth (sneer- show the canine tooth on one side)

76
Q

buccinator

A

press cheeks firmly against the side teeh, pulling back the angle of the mouth (blowing a trumpet)

77
Q

corrugator supercilii

A

draw eyebrows together (as in frowaning)

78
Q

sternocleidomastoid

A

unilaterally: rotates C-spine to opposite side and lateral flex to same side
bilaterally; flex lower C-spine (forward translation), extend upper cervical (head on neck extension)

ECS 1 final (5 decks)

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