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A&P 1 > Muscle Actions > Flashcards

Muscle Actions Flashcards

1
Q

Epicranius frontalis

A

Raise eyebrows

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2
Q

Epicranius occipitalis

A

Pull scalp posteriorly or fix aponeurosis

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3
Q

Orbicularis oculi

A

Close eye and pull eyebrow downward

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4
Q

Orbicularis oris

A

Close and protrude lips

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5
Q

Masseter

A

Elevate mandible (close jaw)

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6
Q

Temporalis

A

Elevate mandible (close jaw)

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7
Q

Sternocleidomastoid

A

Flexion of neck or rotate head toward opposite shoulder

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8
Q

Digastric

A

Elevate hyoid bone or depress mandible (open jaw)

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9
Q

Mylohyoid

A

Elevate hyoid bone & base of tongue

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10
Q

Sternohyoid

A

Depress larynx and hyoid bone

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11
Q

Pectoralis major

A

Adduct and medially rotate arm or pull chest upward to inhale

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12
Q

Serratus anterior

A

Pull scapula anterior/inferior; raise ribs to inhale

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13
Q

Deltoid

A

Abduct arm or flexion, extension or rotation of humerus

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14
Q

Pectoralis minor

A

Move scapula anterior/inferior; raise ribs to inhale

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15
Q

Rectus abdominis

A

Flex vertebral column, depress ribs, compress abdomen causing increased abdominal pressure to exhale

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16
Q

External oblique

A

Flex vertebral column, depress ribs, constrict & compress abdomen causing increased abdominal pressure to exhale, rotate trunk to opposite side

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17
Q

Internal oblique

A

Same actions as external oblique (flex vertebral column, depress ribs, constrict & compress abdomen causing increased abdominal pressure to exhale) but in perpendicular direction and rotate trunk to same side

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18
Q

Transverse abdominis

A

Compress abdomen to exhale

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19
Q

Trapezius

A

Extend head; adduct or abduct scapula and elevate or depress scapula

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20
Q

Latissimus dorsi

A

Extend, adduct and medially rotate arm

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21
Q

Infraspinatus

A

Stabilizes the shoulder joint & laterally rotates the arm

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22
Q

Teres minor

A

Stabilizes the shoulder joint & laterally rotates the arm

23
Q

Supraspinatus

A

Stabilizes the shoulder joint & abducts the arm

24
Q

Subscapularis

A

Stabilizes the shoulder joint & medially rotates the arm

25
Q

Levator scapulae

A

Elevates and adducts scapula or flexes neck

26
Q

Rhomboids

A

Retracts scapula (squares shoulders) and fixes (stabilizes) scapula

27
Q

Biceps brachii

A

Flex forearm (strong) & arm (weakly); supinate hand

28
Q

Brachioradialis

A

Flex forearm

29
Q

Brachialis

A

Flex forearm

30
Q

Triceps brachii

A

Powerfully extend forearm

31
Q

Pronator teres

A

Pronate & weakly flex forearm

32
Q

Flexor carpi radialis

A

Flex and abduct hand at wrist

33
Q

Palmaris longus

A

Flex hand at wrist

34
Q

Flexor carpi ulnaris

A

Flex and adduct hand at wrist

35
Q

Extensor carpi radialis

A

Extend & abduct hand at wrist

36
Q

Extensor digitorum

A

Extends fingers and hand at wrist

37
Q

Extensor carpi ulnaris

A

Extend and adduct hand at wrist

38
Q

Iliopsoas (iliacus & posas major together)

A

Flex trunk or thigh at hip

39
Q

Sartorius

A

Flex, abduct & laterally rotate thigh; flex shank

40
Q

Quadriceps femoris (rectus femoris, vastus lateralis & vastus medialis)

A

Extends and stabilizes knee

41
Q

Tensor fasciae latae

A

Flex, abduct, and medially rotate thigh

42
Q

Adductor muscles (A. magnus, A. longus, & A. brevis)

A

Adduct, flex, and medially rotate thigh

43
Q

Pectineus

A

Adduct, flex, and medially rotate thigh

44
Q

Gracilis

A

Adduct and flex thigh

45
Q

Gluteus maximus

A

Laterally rotate, abduct & powerfully extend thigh

46
Q

Gluteus medius

A

Abduct and medially rotate thigh

47
Q

Biceps femoris

A

Extend thigh, flex knee, & laterally rotate leg

48
Q

Semitendinosus

A

Extend thigh, flex knee, & medially rotate leg

49
Q

Semimembranosus

A

Extend thigh, flex knee, & medially rotate leg

50
Q

Fibularis longus

A

Plantar flex & evert foot

51
Q

Tibialis anterior

A

Dorsiflex & invert foot

52
Q

Extensor digitorum longus

A

Extend toes and dorsiflex foot

53
Q

Triceps surae (Gastrocnemius)

A

Plantar flex foot, may flex knee

54
Q

Triceps surae (Soleus)

A

Plantar flex foot

A&P 1 (15 decks)

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