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BI 121 > Actions of Muscles > Flashcards

Actions of Muscles Flashcards

1
Q

Occipitofrontalis

A

Raises eyebrows, draws scalp anteriorly

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2
Q

Orbicularis oculi

A

Closes eyelids as blinking or squinting

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3
Q

Orbicularis oris

A

Closes mouth, protrudes and purses lips

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4
Q

Platysma

A

Draws an angle of mouth downward, synergist for depression of mandible

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5
Q

Masseter

A

Elevates mandible

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6
Q

Temporalis

A

Elevates mandible

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7
Q

Medial pterygoid

A

Elevates mandible and moves it side to side

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8
Q

Lateral pterygoid

A

Depresses mandible and moves it side to side

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9
Q

Digastric

A

Depresses mandible

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10
Q

Sternocleidomastoid

A

Flexes neck, rotates head to shoulder on opposite side, lateral flexion

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11
Q

Trapezius

A

Extends neck, retracts, fixes , elevates and depresses scapula

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12
Q

Pectoralis minor

A

Draws scapular anteriorly and inferiorly, elevates ribs during deep inspiration

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13
Q

Internal intercostals

A

Depress rib cage during expiration

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14
Q

External intercostals

A

Elevate rib cage during inspiration

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15
Q

Pectoralis major

A

Flexion, adducts and medially rotates upper arm

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16
Q

Teres major

A

Extends, adducts, and medially rotates upper arm

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17
Q

Latissimus dorsi

A

Extends, adducts, and medially rotates upper arm

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18
Q

Deltoid

A

Flexes, extends, abducts, medially, and laterally rotates arm

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19
Q

Subscapularis

A

Medially rotates humerus

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20
Q

Infraspinatus

A

Laterally rotates humerus

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21
Q

Teres minor

A

Laterally rotates humerus

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22
Q

Supraspinatus

A

Initiates abduction of shoulder/humerus; stabilizes shoulder joint

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23
Q

Biceps brachii

A

Flexes and supinates forearm

24
Q

Triceps brachii

A

Extends forearm

25
Q

Brachialis

A

Flexes forearm

26
Q

Supinator

A

Supinates forearm

27
Q

Pronator teres

A

Pronates forearm

28
Q

Brachioradialis

A

Flexes forearm at elbow

29
Q

Flexor carpi radialis

A

Flexes and abducts hand

30
Q

Palmaris longus

A

Weak wrist flexor

31
Q

Extensor digitorum

A

Extends digits 2-5

32
Q

Flexor digitorum superficialis

A

Flexes digits 2-5

33
Q

External oblique

A

Flexes vertebral column, fixes and depresses ribs, rotates trunk, compresses anterior abdominal wall

34
Q

Internal oblique

A

Flexes vertebral column, fixes and depresses ribs, rotates trunk, compresses anterior abdominal wall

35
Q

Transversus abdominis

A

Compresses anterior abdominal wall

36
Q

Rectus abdominis

A

Flexes vertebral column; increases abdominal pressure and fixes and depresses ribs

37
Q

Erector spinae

A

Prime mover for back extension

38
Q

Iliopsoas

A

Flexes trunk at thigh; major flexor of hip

39
Q

Tensor fasciae latae

A

Extends knee via iliotibial tract; upright postural control

40
Q

Adductor longus

A

Adducts, flexes and laterally rotates thigh

41
Q

Gracilis

A

Adducts thigh and flexes leg at knee

42
Q

Gluteus medius

A

Abducts and medially rotates thigh

43
Q

Gluteus maximus

A

Powerfully extends and laterally rotates thigh

44
Q

Sartorius

A

Flexes leg; flexes, abducts and laterally rotates thigh

45
Q

Biceps femoris

A

Extends thigh, flexes leg

46
Q

Semitendinosus

A

Extends thigh and flexes leg; medially rotates leg

47
Q

Semimembranosus

A

Extends thigh; flexes knee; medially rotates leg

48
Q

Rectus femoris

A

Extends leg and flexes thigh

49
Q

Vastus lateralis

A

Extends leg

50
Q

Vastus medialis

A

Extends leg

51
Q

Vastus intermedius

A

Extends leg

52
Q

Tibialis anterior

A

Dorsiflexes and inverts of foot

53
Q

Extensor digitorum longus

A

Extends toes, dorsiflexes foot, everts foot

54
Q

Flexor digitorum longus

A

Flexes toes, plantar flexes and inverts foot

55
Q

Gastrocnemius

A

Flexes leg; plantar flexes foot

56
Q

Soleus

A

Plantar flexes foot

57
Q

FIbularis longus

A

Plantar flexes and everts foot

BI 121 (28 decks)

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