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Back and Extremities > Muscle Actions- Back and Lower Extremity > Flashcards

Muscle Actions- Back and Lower Extremity Flashcards

1
Q

Erector Spinae

A

extension & lateral flexion of the vertebral column

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2
Q

Semispinalis

A

extension & contralateral rotation of the vertebral column

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3
Q

Multifidus and Rotatores

A

stabilizes vertebrae, and assists with extension & rotation of the vertebral column

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4
Q

Iliacus

A

flexes thigh and stabilizes hip joint

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5
Q

Psoas

A

flexes thigh and stabilizes hip joint

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6
Q

Rectus Femoris

A

flexes thigh, and extends leg

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7
Q

Sartorius

A

flexes, abducts & laterally rotates thigh, and flexes leg

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8
Q

Tensor Fasciae Latae

A

abducts, flexes & medially rotates thigh, and assists in maintaining extended leg

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9
Q

Vastus intermedius

A

extends leg

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10
Q

Vastus lateralis

A

extends leg

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11
Q

Vastus medialis

A

extends leg

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12
Q

Adductor brevis

A

adducts thigh

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13
Q

Adductor longus

A

adducts & flexes thigh

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14
Q

Adductor magnus

A

adducts (adductor part) & extends (hamstring part) thigh

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15
Q

Gracilis

A

flexes & medially rotates the leg, and adducts thigh

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16
Q

Pectineus

A

adducts & flexes thigh

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17
Q

Obturator Externus

A

laterally rotates thigh

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18
Q

Gemellus Inferior

A

laterally rotates thigh

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19
Q

Gemellus superior

A

laterally rotates thigh

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20
Q

Gluteus maximus

A

extends & laterally rotates thigh, & tenses fascia lata (iliotibial tract)

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21
Q

Gluteus medius

A

abducts & medially rotates thigh; and keeps the pelvis level when opposite leg is raised

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22
Q

Gluteus minimis

A

abducts & medially rotates thigh; and keeps the pelvis level when opposite leg is raised

23
Q

Obturator Internus

A

laterally rotates thigh

24
Q

Piriformis

A

abducts & laterally rotates thigh

25
Q

Quadratus Femoris

A

laterally rotates thigh

26
Q

Biceps femoris

A

flexes leg (both heads) & extends thigh (long head only)

27
Q

Semimembranosus

A

extends thigh & flexes leg

28
Q

Semitendinosus

A

extends thigh & flexes leg

29
Q

Extensor Digitorum Longus

A

dorsiflexes ankle, and extends digits 2-5 (IP & MP)

30
Q

Extensor Hallucis Longus

A

dorsiflexes ankle, and extends great toe (MP & IP)

31
Q

Peroneus Tertius

A

dorsiflexes ankle, and everts foot

32
Q

Tibialis anterior

A

dorsiflexes ankle, and inverts foot

33
Q

Perioneus longus

A

plantar flexes ankle, and everts foot

34
Q

Peroneus brevis

A

plantar flexes ankle, and everts foot

35
Q

Flexor digitorum longus

A

plantar flexes ankle, and flexes digits 2-5 (MP & IP)

36
Q

Flexor hallucis longus

A

plantar flexes ankle, and flexes great toe (MP & IP)

37
Q

Gastrocnemius

A

flexes leg, and plantar flexes ankle

38
Q

Plantaris

A

flexes leg, and plantar flexes ankle

39
Q

Popliteus

A

unlocks knee during (initial) flexion

40
Q

Soleus

A

plantar flexes ankle

41
Q

Tibialis Posterior

A

plantar flexes ankle, and inverts foot

42
Q

Abductor Digiti Minimi

A

abducts & flexes 5th digit

43
Q

Abductor Hallucis

A

flexes & abducts great toe

44
Q

Adductor Hallucis

A

adducts great toe

45
Q

Extensor Digitorum Brevis

A

extension of digits 2-5 (MP & IP)

46
Q

Extensor Hallucis Brevis

A

extension of great toe (MP)

47
Q

Flexor digitorum accessorius

A

assists flexor digitorum longus

48
Q

Flexor digitorum brevis

A

flexes toes (proximal IP)

49
Q

Flexor digiti minimi

A

flexion of 5th digit (MP)

50
Q

Flexor Hallucis brevis

A

flexion of great toe (MP)

51
Q

Interossei-dorsal

A

abducts (MP) & flexes (MP) & extends (IP) digits 2-4

52
Q

Interossei-plantar

A

adducts & flexes (MP) & extends (IP) digits 3-5

53
Q

Lumbricals

A

flexes proximal phalanges (MP), and extend IP joints

Back and Extremities (5 decks)

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