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Anatomy > Muscles - muscle action (medium hard) > Flashcards

Muscles - muscle action (medium hard) Flashcards

1
Q

What is the innervation of this muscle?

A

Muscle - adductor brevis

Primary - adducts hip

Secondary

Medially (externally) rotates thigh

Flexes hip

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2
Q

What joints does this muscle act on?

A

Muscle - Teres major

Extends, medially rotates and adducts arm at shoulder

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3
Q

What joints does this muscle act on?

A

Muscle - abductor pollicis brevis

Abducts thumb at both carpometacarpal joint and metacarpophalangeal joint

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4
Q

What joints does this muscle act on?

A

Muscle - Inferior gemellus

Laterally (externally) rotates hip

Abduct flexed thigh (secondary)

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5
Q

What joints does this muscle act on?

A

Muscle - Pectoralis minor

Depresses scapula, protracts scapula

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6
Q

What joints does this muscle act on?

A

Muscle - Palmaris longus

Flexes wrist

Weakly flexes elbow

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7
Q

What joints does this muscle act on?

A

Muscle - Tensor fascia lata

Flexes and abducts hip

Rotates medially hip

(Tenses iliotibial tract)

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8
Q

What joints does this muscle act on?

A

Muscle - Pectoralis major

Protracts scapula

Flexes, medially rotates and adducts arm/shoulder

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9
Q

What joints does this muscle act on?

A

Muscle - Extensor digiti minimi

Extension at all little finger joints

Metacarpophalangeal + interphalangeal

Weak extensor of wrist

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10
Q

What joints does this muscle act on?

A

Muscle - Pronator teres

Pronates forearm at radioulnar joints

Weakly flexes elbow

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11
Q

What joints does this muscle act on?

A

Muscle - Dorsal interossei

Primary

Abduct digits 2-4

Secondary

Assist lumbircals in extension of interphalngeal joints

Flex at metacarpophalngeal joints

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12
Q

What joints does this muscle act on?

A

Muscle - Lateral 2 lumbircals

Flexion @ metacarpophalangeal joint

Extension @ interphalangeal joints

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13
Q

What joints does this muscle act on?

A

Muscle - Medial head triceps

Extends elbow

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14
Q

What joints does this muscle act on?

A

Muscle - Flexor hallucis brevis

Flexes at metatarsophalangeal joint

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15
Q

What joints does this muscle act on?

A

Muscle - Psoas major

Lateral flexion at vertebral column

Thigh flexion (hip)

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16
Q

What joints does this muscle act on?

A

Muscle - Levator scapulae

Elevates scapula

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17
Q

What joints does this muscle act on?

A

Muscle - Infraspinatous

Externally rotates arm @ shoulder

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18
Q

What joints does this muscle act on?

A

Muscle - Extensor pollicus longus

Extends thumb at interphalangeal joints + metacarpophalangeal + carpometacarpal joints

Extends wrist

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19
Q

What joints does this muscle act on?

A

Muscle - Subscapularis

Internally rotates arm at shoulder

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20
Q

What joints does this muscle act on?

A

Muscle - Supraspinatous

Abducts arm at shoulder - initiates the movement

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21
Q

What joints does this muscle act on?

A

Muscles - Lumbricals

Flexes toes at metatarsophalangeal joint

Extend at interphalangeal joints

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22
Q

What joints does this muscle act on?

A

Muscle - Supinator

Supinates forearm at radioulnar joints

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23
Q

What joints does this muscle act on?

A

Muscle - Obturator internus

externally rotates hip

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24
Q

What joints does flexor digitorum profundus act on?

A

Primary

proximal interphalangeal 2-5 - flexion

Secondary:

Wrist - Flexion

Metacarpal-phalangeal - flexion

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25
Q

What joints does this muscle act on?

A

Muscle - Quadratus plantae

Flexes digits 2-5 of feet

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26
Q

What joints does this muscle act on?

A

Muscle - Extensor carpi ulnaris

Extends wrist (with extensor carpi radialis)

Adducts wrist with flexor carpi ulnaris

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27
Q

What joints does this muscle act on?

A

Muscle - Tibialis posterior

Plantarflexes foot at ankle

Inverts foot at subtalar joint

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28
Q

What joints does this muscle act on?

A

Muscle - Latissimus dorsi

Shoulder extension + adduction + internal rotation of arm

Secondary - rotation of trunk

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29
Q

What is the action of this muscle?

A

Muscle - Popliteus

Flexes + medially rotates leg to unlock knee in flexion

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30
Q

What joints does this muscle act on?

A

Muscle - Coracobrachialis

Shoulder flexion + adduction

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31
Q

What joints does this muscle act on?

A

Muscle - Fibularis tertius

Dorsiflexion of foot at ankle

Eversion at subtalar joint

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32
Q

What joints does this muscle act on?

A

Muscle - Deltoid

Together - adducts arm @ shoulder

Anterior - flex arm @ shoulder + medial rotation

Posterior - extend arm @ shoulder + lateral rotation

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33
Q

What joints does this muscle act on?

A

Muscle - Lateral head of triceps

Elbow extension

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34
Q

What joints does this muscle act on?

A

Muscle - Rectus femoris

As part of quadriceps extends knee

Only quadricep to cross hip. Flexes hip

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35
Q

What joints does this muscle act on?

A

Muscle - Extensor hallicus brevis

Extends big toe at metatarsophalangeal joint

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36
Q

What joints does this muscle act on?

A

Muscle - Rhomboid minor

Elevates, rotates + retracts scapula

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37
Q

What joints does this muscle act on?

A

Muscle - Superior gemellus

externally rotates hip

Abducts hip

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38
Q

What joints does this muscle act on?

A

Muscle - Flexor carpi ulnaris

Flexes wrist

Adducts hand

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39
Q

What joints does this muscle act on?

A

Muscle - Flexor digiti minimi brevis

Flexes metacarpophalangeal and interphalangeal joints of little finger

40
Q

What joints does this muscle act on?

A

Muscles - Medial 2 lumbricals

Flexion @ metacarpophalangeal joint

Extension @ interphalangeal joints

41
Q

What joints does this muscle act on?

A

Muscle - Gastronemius

Plantar flexes ankle

Secondary - Flexes knee

42
Q

What joints does this muscle act on?

A

Muscles - Plantar interossei

Flexes + adducts digits 3-5

43
Q

What joints does this muscle act on?

A

Muscle - Extensor hallicus longus

Extends big toe at metatarsophalangeal joint, interphalangeal joints

Dorsiflexes ankle

44
Q

What joints does this muscle act on?

A

Muscle - Quadraceps: Vastus medialis

Extends knee

45
Q

What joints does this muscle act on?​

A

Muscle - Flexor digitorum superficialis

Flexes interphalangeal + metacarpophalangeal joints 2-5

Flexes wrist

Weakly flexes elbow

46
Q

What joints does this muscle act on?

A

Muscle - Piriformis

Externally rotates + abducts hip

47
Q

What joints does this muscle act on?

A

Muscle - Flexor carpi radialis

Flexes wrist

Abducts hand

48
Q

What joints does this muscle act on?

A

Muscle - Long head of triceps

Extends elbow

49
Q

What joints does this muscle act on?

A

Muscle - Opponens pollicus

Opposes thumb

50
Q

What joints does this muscle act on?

A

Muscle - Pectineus

Adducts, flexes and medially rotates thigh @ shoulder

51
Q

What joints does this muscle act on?

A

Muscle - Biceps femoris

Primary

Flexes + laterally (externally) rotates knee

Secondary - extends hip

52
Q

What joints does this muscle act on?

A

Muscle - Opponens digiti minimi

Brings little finger toward thumb

Flexes + laterally rotates figner

53
Q

What joints does this muscle act on?

A

Muscle - Fibularis brevis

Plantar flexes foot (ankle)

Everts foot at subtalar joint

54
Q

What joints does this muscle act on?

A

Muscle - Brachioradialis

Flexes elbow (best when partially pronated)

55
Q

What joints does this muscle act on?

A

Muscle - Iliacus

Prime flexor of hip

Medially rotates hip

56
Q

What joints does this muscle act on?

A

Muscle - Rhomboid major

Elevates scapula

Rotates scapula

Retracs scapula

57
Q

What joints does this muscle act on?

A

Muscle - adductor longus

Primary - adducts hip

Secondary

Externally (medially) rotates

58
Q

What joints does this muscle act on?

A

Muscle abductor hallucis

Abducts big toe

59
Q

What joints does this muscle act on?

A

Muscle - Plantaris

Assists in knee flexion

Assists in plantar flexion of foot

60
Q

What joints does this muscle act on?

A

Muscle - Tibialis anterior

Dorsiflexes foot at ankle

Inverts foot at subtalar joint

61
Q

What joints does this muscle act on?

A

Muscle - Biceps brachii

Primary

Elbow flexion

Supination

Secondary

Flexes shoulder

62
Q

What joints does this muscle act on?

A

Muscle: Hamstrings - semimembranosis

Extends thigh

Flexes knee

63
Q

What joints does this muscle act on?

A

Muscle - Extensor carpi radialis longus

Extends wrist with extensor carpi ulnaris

Abducts wrist with flexor carpi radialis

64
Q

What joints does this muscle act on?

A

Muscle - Gluteus medius

Abducts and medially rotates hip

65
Q

What joints does this muscle act on?

A

Muscle - adductor magnus

Primary - adducts hip

Secondary - externally rotates + extends hip

66
Q

What joints does this muscle act on?

A

Muscle - Extensor digitorum

Primary

Extends interphalangeal joints 2-5

Secondary

Extends wrist

Extends metacarpophalangeal joints 2-5

67
Q

What joints does this muscle act on?

A

Muscle - Sartorius

Flexes, abducts and laterally rotates hip

Flexes knee

68
Q

What joints does this muscle act on?

A

Muscle - Abductor digiti minimi

Abducts little finger at metacarpophalngeal joint

69
Q

What joints does this muscle act on?

A

Muscle - Quadratus femoris

Externally rotates + adducts hip

70
Q

What joints does this muscle act on?

A

Muscle - Serratus anterior

Elevates ribs

Laterally rotates scapula

71
Q

What joints does this muscle act on?

A

Muscle - Gluteus minimus

Abducts and medially (internally) rotates hip

72
Q

What is the innervation of this muscle?

A

Muscle - Flexor digitorum longus

Plantar flexes ankle

Flexes all joints of digits 2-5

Inverts subtalar joint

73
Q

What joints does this muscle act on?

A

Muscle - Soleus

Plantar flexes foot

74
Q

What joints does this muscle act on?

A

Flexor hallucis longus

Flexes interphalangeal + metatarsophalangeal joints of toe

Plantar flexes ankle

Inverts at subtalar joint

75
Q

What joints does this muscle act on?

A

Muscle - Extensor carpi radialis brevis

Wrist - extends + abducts

76
Q

What joints does this muscle act on?

A

Muscle - Obturator externus

Laterally rotates hip

Adducts hip

77
Q

What joints does this muscle act on?

A

Muscle - Extensor digitorum brevis

Extends toes 2-5

78
Q

What joints does this muscle act on?

A

Muscle - Quadraceps: Vastus lateralis

Extend knee

79
Q

What joints does this muscle act on?

A

Muscle - Brachialis

Flexes elbow

80
Q

What joints does this muscle act on?

A

Muscle - abductor pollicis longus

Primary - Abducts + extends thumb at carpometacarpal joint

Secondary - Flex + abduct wrist

81
Q

What joints does this muscle act on?

A

Muscle - Flexor pollicus longus

Flexes carpometacarpal joint of thumb

Flexes interphalangeal + metacarpophalangeal joint of thumb

Flexes + abducts wrist

82
Q

What joints does this muscle act on?

A

Muscle - Extensor digitorum longus

Extends toes 2-5

Extends foot at ankle (dorsiflexion)

83
Q

What joints does this muscle act on?

A

Muscle - abductor digiti minimi

Abducts + flexes little toe

(Also supports lateral longitudinal arch)

84
Q

What joints does this muscle act on?

A

Muscle - Trapezius

Superior fibres - elevate shapula (shrugging)

Extend head

Middle fibres - Retract (adduct) scapula

Inferior fibres - depress scapula

85
Q

What joints does this muscle act on?

A

Muscle - Pronator quadratus

Pronates forearm at radioulnar joints

86
Q

What joints does this muscle act on?

A

Muscle - Adductor pollicus

Primary - adducts thumb at carpometacarpal joint

Secondary - flexes thumb at metacarpophalangeal joint

87
Q

What joints does this muscle act on?

A

Muscle - Flexor pollicus brevis

Flexes carpometacarpal + metacarpophalangeal joints of thumb

88
Q

What joints does this muscle act on?

A

Muscle - Extensor pollicus brevis

Extends thumb at carpometacarpal joint

Extends thumb at metacarpophalangeal joint

Abducts wrist

89
Q

What joints does this muscle act on?

A

Muscle - Teres minor

Externally rotates shoulder

Weakly adducts arm

90
Q

What joints does this muscle act on?

A

Muscle - Gracilis

Adducts hip

Flexes knee

Medially rotates knee when flexed

91
Q

What joints does this muscle act on?

A

Muscle - adductor hallucis

Adducts + flexes metatarsophalngeal joint of big toe

92
Q

What joints does this muscle act on?

A

Muscle - Fibularis longus

Everts at subtalar joint

Plantar flexes at ankle joint

93
Q

What joints does this muscle act on?

A

Muscle - Flexor digitorum brevis

Flexes digits 2-5 on foot - proximal interphalangeal + metacarpophalangeal joints

94
Q

What joints does this muscle act on?

A

Muscle - Hamsrings: Semitendinosis

Extends hip

Flexes knee

95
Q

What joints does this muscle act on?

A

Muscle - Gluteus maximus

Major extensor of thigh (hip)

Externally rotates and abducts hip

Anatomy (34 decks)

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