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Muscles > Muscles & actions > Flashcards

Muscles & actions Flashcards

0
Q

orbicularis oculi

A

closes eyes

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1
Q

orbicularis oris

A
  • closes mouth

- protrudes lips

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2
Q

masseter

A
  • closes jaw

- elevates mandible

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3
Q

temporalis

A
  • closes jaw

- elevates mandible

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4
Q

pectoralis major

A

flexes, adducts, & medially rotates the arm at the shoulder

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5
Q

brachioradialis

A

flexes the forearm at the elbow

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6
Q

pronator teres

A

pronates the forearm at the proximal-radio ulnar joint

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7
Q

flexor carpi radialis

A
  • flexes the hand at the wrist

- abducts (radial deviation) the hand at the wrist

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8
Q

flexor carpi ulnaris

A
  • flexes the hand at the wrist

- adducts (ulnar deviation) the hand at the wrist

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9
Q

flexor digitorum superficialis

A

flexes the wrist & middle phalanges of 2nd-5th digits

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10
Q

extensor digitorum

A

extends the digits & the hand at the wrist

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11
Q

supinator

A

supinates the forearm at the proximal-radio ulnar joint

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12
Q

psoas major

A
  • flexes the thigh at the hip

- flexes the trunk if lower extremity remains on floor

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13
Q

iliacus

A

flexes the thigh at the hip

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14
Q

gluteus maximus

A

extends & laterally rotates the thigh at the hip

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15
Q

gluteus medius

A

abducts the thigh

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16
Q

vastus lateralis

A

extends the leg at the knee

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17
Q

vastus medialis

A

extends the leg at the knee

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18
Q

vastus intermedius

A

extends the leg at the knee

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19
Q

rectus femoris

A

extends the leg at the knee & flexes the thigh at the hip

20
Q

sartorius

A
  • flexes & laterally rotates the thigh at the hip

- flexes the leg at the knee

21
Q

biceps femoris

A
  • flexes the leg at the knee

- extends & laterally rotates the thigh at the hip (long head)

22
Q

semitendinosus

A
  • flexes the leg at the knee

- extends & medially rotates the thigh at the hip

23
Q

semimembranosus

A
  • flexes the leg at the knee

- extends & medially rotates the thigh at the hip

24
Q

gracilis

A

adducts the thigh at the hip

25
Q

tibialis anterior

A

dorsiflexion & inversion of ankle and foot

26
Q

extensor digitorum longus

A
  • extension of digits

- dorsiflexion at ankle

27
Q

gastrocnemius

A
  • plantar flexes the foot when knee is extended

- flexes the leg at the knee

28
Q

soleus

A

plantar flexion of the foot at the ankle

29
Q

sternocleidomastoid

A
  • flexion of the neck forward when both muscles contract together
  • lateral flexion to the same side, coupled w/ rotation towards the opposite side if unilateral contraction
30
Q

deltoid

A
  • abduction of the arm at the shoulder

- also can flex or extend at the shoulder

31
Q

levator scapulae

A

elevates the scapula

32
Q

trapezius

A
  • retracts the scapula
  • elevates or depresses the scapula
  • can also extend the head
33
Q

latissimus dorsi

A

extends, adducts, & medially rotates the shoulder

34
Q

supraspinatus

A

abduction at the shoulder

35
Q

infraspinatus

A

lateral rotation at the shoulder

36
Q

subscapularis

A

medial rotation at the shoulder

37
Q

teres minor

A

lateral rotation at the shoulder

38
Q

teres major

A

medial rotation & adduction at shoulder

39
Q

diaphragm

A

flattens to increase the volume of the thoracic cavity, resulting in inspiration

40
Q

rhomboids (major & minor)

A

retracts scapula

41
Q

rectus abdominis

A

flexes vertebral column

42
Q

internal oblique abdominis

A
  • flexes & rotates vertebral column

- compresses the abdomen

43
Q

external oblique abdominis

A
  • flexes & rotates vertebral column

- compresses the abdomen

44
Q

erector spinae

A
  • bilateral contraction extends vertebral column

- unilateral contraction rotates & laterally flexes

45
Q

internal intercostals

A

draws ribs together to depress thorax, resulting in expiration

46
Q

external intercostals

A

pulls ribs to one another to elevate thoracic cavity, resulting in inspiration

47
Q

triceps brachii

A
  • extends the forearm at the elbow

- long head also extends at the shoulder

48
Q

biceps brachii

A

flexes the forearm at the elbow & supinates the forearm

Muscles (2 decks)

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