Practical Two Muscles & Actions Flashcards

1
Q

Orbicularis oculi

A

Closes eyes

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2
Q

Orbicularis oris

A

Closes lips

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3
Q

Buccinator

A

Compresses cheek

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4
Q

Masseter

A

Prime mover of jaw closure

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5
Q

Platysma

A

Tenses skin of neck, “shaving muscle”

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6
Q

Sternocleidomastoid

A

Flexion of neck forwards

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7
Q

Scalenes (Anterior, Middle, and Posterior)

A

Elevate ribs 1 and 2

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8
Q

Pectoralis major

A

Prime mover of arm flexion, adducts and medially rotates arm

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9
Q

Serratus anterior

A

Prime mover to protract and hold scapula against the chest wall, rotates scapula

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10
Q

Deltoid

A

Prime mover of arm abduction

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11
Q

Pectoralis minor

A

Draws scapula forward and inferiorly

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12
Q

External intercostals

A

Pull ribs toward each other for rib elevation

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13
Q

Internal intercostals

A

Draw ribs together for rib cage depression

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14
Q

Diaphragm

A

Prime mover of inspiration, flattens during contraction

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15
Q

Rectus abdominis

A

Flexes/Rotates vertebral column

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16
Q

External oblique

A

Compresses abdominal wall

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17
Q

Internal oblique

A

Compresses abdominal wall

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18
Q

Trapezius

A

Raises, rotates, and adducts scapula

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19
Q

Latissimus dorsi

A

Prime mover of arm extension, adducts and medially rotates arm

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20
Q

Infraspinitus

A

Lateral rotation of humerus

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21
Q

Teres minor

A

Lateral rotation of humerus

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22
Q

Teres major

A

Extends, medially rotates, and adducts humerus

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23
Q

Supraspinitus

A

Initiates abduction of humerus

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24
Q

Erector spinae (From most lateral to most medial: Iliocostales, Longissimus, and Spinalis)

A

Extend and bend vertebral column laterally

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25
Q

Splenius

A

Extend or hyperextend head

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26
Q

Tricep brachii

A

Powerful forearm extensor

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27
Q

Bicep brachii

A

Powerful elbow flexor and supinator

28
Q

Brachioradialis

A

Synergist in forearm flexion

29
Q

Brachialis

A

Forearm flexion

30
Q

Pronator teres

A

Pronate forearm

31
Q

Flexor carpi radialis

A

Flexor of wrist and abducts hand

32
Q

Flexor carpi ulnaris

A

Flexor of wrist and adducts hand

33
Q

Flexor digitorum superficialis

A

Flexes fingers 2-5

34
Q

Flexor pollicis longus

A

Flexes thumb

35
Q

Flexor digitorum profundus

A

Flexes distal phalanges

36
Q

Pronator quadrus

A

Pronates forearm

37
Q

Extensor carpi radialis longus

A

Extends and abducts wrist

38
Q

Extensor carpi radialis brevis

A

Extends and abducts wrist

39
Q

Extensor digitorum

A

Prime mover of finger extension

40
Q

Extensor carpi ulnaris

A

Extends and adducts wrist

41
Q

Extensor pollicis longus and brevis

A

Extend thumb

42
Q

Abductor pollicis longus

A

Abducts and extends thumb

43
Q

Supinator

A

Supinates forearm (with help of bicep brachii)

44
Q

Iliopsoas (Iliacus and Psoas major)

A

Flex trunk and thigh, lateral flexion of vertebral column

45
Q

Sartorius

A

Flexes, abducts, and laterally rotates thigh; flexes knee

46
Q

Adductors (Magnus, Longus, and Brevis) of leg

A

Adducts/medially rotate and flex thigh

47
Q

Gracilis

A

Adduct thigh, flex and medially rotate leg

48
Q

Rectus femoris

A

Extend knee and flex thigh

49
Q

Vastus lateralis

A

Extend/Stabilize knee

50
Q

Vastus medialis

A

Extend knee

51
Q

Vastus intermedius

A

Extend knee

52
Q

Tensor faciae latae

A

Steadies trunk

53
Q

Gluteus maximus

A

Thigh extensor

54
Q

Gluteus medius

A

Abducts and medially rotates thigh

55
Q

Biceps femoris

A

Extend thigh and flex knee

56
Q

Semitendinosus

A

Extend thigh and flex knee

57
Q

Semimembranosus

A

Extend thigh and flex knee

58
Q

Tibialis anterior

A

Prime mover or dorsiflexion

59
Q

Extensor digitorum longus

A

Prime mover of toe extension

60
Q

Extensor hallucis longus

A

Extends great toe

61
Q

Gastrocnemius

A

Plantar flexes foot

62
Q

Soleus

A

Plantar flexion

63
Q

Tibialis posterior

A

Prime mover of foot inversion

64
Q

Flexor digitorum longus

A

Flexes toes, also plantar flexes and inverts foot

65
Q

Flexor hallucis longus

A

Flexes great toe, also plantar flexes and inverts foot