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Biology 201 > Muscle Actions > Flashcards

Muscle Actions Flashcards

1
Q

Extensor Carpi Radialis Brevis

A

Extends wrist, radially deviates wrist (abduction)

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2
Q

Extensor Carpi Ulnaris

A

Extends wrist, ulnar deviates wrist (adduction)

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3
Q

Flexor Carpi Ulnaris

A

Flexes wrist, ulnar deviates wrist (adduction)

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4
Q

Flexor Carpi Radialis

A

Flexes wrist, radially deviates wrist (abduction)

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5
Q

Extensor Digitorum

A

Extends digits of hand and wrist

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6
Q

Flexor Digitorum

A

Flexes digits of hand and wrist

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7
Q

Brachialis

A

Flexes elbow (as in raising forearm)

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8
Q

Pronator Teres

A

Pronates forearm at elbow (as in twisting forearm toward body)

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9
Q

Biceps Brachii

A

Flexes elbow, supinates forearm

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10
Q

Triceps Brachii

A

Extends forearm at elbow (long head also stabilizes shoulder)

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11
Q

Subscapularis

A

Medially rotates humerus at shoulder and stabilizes shoulder

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12
Q

Supraspinatus

A

Abducts arm at shoulder and stabilizes shoulder

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13
Q

Infraspinatus

A

Laterally rotates humerus at shoulder and stabilizes shoulder

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14
Q

Teres Minor

A

Adducts and laterally rotates humerus at shoulder and stabilizes shoulder

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15
Q

Deltoid (Anterior)

A

Flexion and medial rotation of humerus at shoulder

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16
Q

Deltoid (Middle)

A

Abducts humerus at shoulder (as in upward flap)

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17
Q

Deltoid (Posterior)

A

Extension and lateral rotation of humerus

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18
Q

Pectoralis Major

A

Flexion, adduction, medial rotation of humerus at shoulder (as in bench press)

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19
Q

Latissimus Dorsi

A

Extension, adduction, medial rotation of humerus at shoulder

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20
Q

Levator Scapula

A

Elevates, adducts (retracts) scapula (as in bring shoulder to ear)

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21
Q

Rhomboideus Major

A

Adducts (retracts) scapula (as in pulling shoulders back and up)

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22
Q

Serratus Anterior

A

Abducts scapula (to raise arm and pull shoulder forward, as in punching)

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23
Q

Trapezius (Upper)

A

Elevates scapula (as in shrugging)

24
Q

Trapezius (Middle)

A

Retracts and elevates scapula (as in pulling shoulders back and up)

25
Q

Trapezius (Lower)

A

Retracts and depresses scapula (as in pulling shoulders back and down)

26
Q

Zygomatic Major

A

Draws angle mouth up (as in a smile)

27
Q

Frontalis

A

Raise eyebrow, wrinkle forehead

28
Q

Orbicularis Oris

A

Squeezes closed and protrudes lips (as in kissing)

29
Q

Buccinator

A

Compresses cheek (as in sucking)

30
Q

Orbicularis Oculi

A

Squeezes eyes closed (as in squinting)

31
Q

Sternocleidomastoid

A

Flexes neck (as in cocking head to one side, or flex down, or flex down if both)

32
Q

Splenius Capitus

A

Extends or hyperextends neck (as if looking up)

33
Q

Gluteus Maximus

A

Extends hip (as in pushing down on a stair), rotates femur laterally

34
Q

Adductor Magnus

A

Extends hip and adducts femur

35
Q

Tensor Fasciae Latae

A

Tenses or stabilizes hip and knee joints

36
Q

Adductor Longus

A

Flexes hip, adducts leg

37
Q

Psoas Major

A

Flexes hip (as in lifting leg to place on stair)

38
Q

Gracilis

A

Adducts thigh, flexes knee

39
Q

Pectineus

A

Adducts, flexes, medially rotates thigh at hip

40
Q

Sartorius

A

Flexes hip and flexes knee, laterally rotates thigh (crossed legs position)

41
Q

Spinalis Thoracis

A

Unilaterally: Lateral flexion of the vertebral column.

Bilaterally: Extension and hyperextension of the vertebral column.

42
Q

Rectus Abdominis

A

Compresses abdomen, flexes vertebral column

43
Q

External Intercostals

A

Pulls ribs up toward origin, elevates ribcage to cause inspiration.

44
Q

Diaphragm

A

Drops down to enlarge thoracic cavity, causing inspiration.

45
Q

Gastrocnemius

A

Plantar flexion at ankle, flexes knee

46
Q

Soleus

A

Plantar flexion at ankle

47
Q

Tibialis Anterior

A

Dorsiflexion and inversion at ankle

48
Q

Masseter

A

Elevates mandible (as in closing mouth)

49
Q

Temporalis

A

Elevates mandible.

50
Q

Platysma

A

Pulls lower lip down (as in frowning)

Lowers jaw (as in opening mouth)

51
Q

Rectus Femoris

A

Extends knee, flexes hip

52
Q

Vastus Lateralis

A

Extends knee

53
Q

Vastus Medialis

A

Extends knee

54
Q

Vastus Intermedius

A

Extends knee

55
Q

Biceps Femoris

A

Flexes and laterally rotates knee, extends and adducts hip.

56
Q

Semimembranosus

A

Flexes knee

57
Q

Semitendinosus

A

Flexes knee

Biology 201 (16 decks)

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