leg muscles Flashcards

1
Q

Gemellus Inferior

A

Laterally rotates and stabilizes thigh

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2
Q

piriformis

A

laterally rotates and stabilizes thigh

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3
Q

gluteus minimus

A

abducts and medially rotates thigh. tilts pelvis on walking

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4
Q

gluteus medius

A

abducts and medially rotates thigh

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5
Q

quadratus femoris

A

laterally rotates and stabilizes hip

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6
Q

gluteus maximus

A

extends and laterally rotates hip, aids in knee extension via iliotibial tract

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7
Q

tensor fascia lata

A

maintains knee extended (assists gluteus maximus) and abducts thigh

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8
Q

Obturator internus

A

rotates the thight laterally. extends and abducts the flexed thigh

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9
Q

Obturator externus

A

rotates the thigh laterally

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10
Q

Biceps femoris

A

flexes the leg and then rotates it laterally. long head extends the thigh and rotates it laterally

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11
Q

Semitendinosus

A

extends the thigh. flexes and rotates the leg medially

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12
Q

semimembraneous

A

extends the thigh. flexes and rotates the thigh medially.

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13
Q

rectus femoris

A

extends the leg and flexes the thigh

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14
Q

vastus lateralis

A

extends the leg

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15
Q

vastus medialis

A

extends the leg

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16
Q

vastus intermedius

A

extends the leg

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17
Q

sartorius

A

flexes the thigh and rotates it laterally. flexes and medially rotates the leg

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18
Q

pectineus

A

adducts, flexes and rotates the thigh medially

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19
Q

gracilis

A

adducts the thigh, flexes the leg, and rotates the leg medially

20
Q

adductor longus

A

adducts the thigh, flexes and roates the thigh medially

21
Q

adductor brevis

A

adducts, flexes and rotates the thigh medially

22
Q

adductor magnus

A

powerful adductor of the thigh. superior half rotates the thigh medially and flexes it. the inferior half extends the thigh and rotates it laterally

23
Q

What arteries are involved in the cruciate anastomosis?

A

inferior gluteal artery
lateral circumflex femoral artery (transverse branch of)
medial circumflex femoral artery (transverse branch of)
first perforating artery from profunda femoris (ascending branch of)

24
Q

Extensor digitorum longus

A

extends lateral four digits and dorsiflexes foot at ankle

25
Q

Extensor halluces longus

A

Extends great toe, dorsiflexes foot at ankle

26
Q

Fibularis peroneus tertius

A

dorsiflexes foot at ankle and everts foot

27
Q

Tibialis anterior

A

dorsiflexes foot at ankle and inverts foot

28
Q

Articularis genus

A

pulls supratellar bursa superiorly with extension of knee

29
Q

extensor digitorum brevis and extensor hallucis brevis

A

aids the extensor digitorum longus in extending 4 medial digits

30
Q

iliacus

A

flexes thigh at hips and stabilizes hip joints, acts with psoas major

31
Q

Psoas

A

flexes hip, flexes vertebral column, balances trunk while in sitting position, etc

32
Q

rectus femoris

A

extends leg at knee joint and flexes thigh at hip joint

33
Q

abductor digiti minimi

A

abducts and flexes 5th digit

34
Q

abductor hallucis

A

abducts and flexes 1st digit

35
Q

dorsal interossei

A

adbcust 2nd through 4th toes, flex metatarsophangeal joints, and extends phalengeas

36
Q

flexor digiti minimi brevis

A

flexes proximal phalanx of 5th digit

37
Q

flexor digitorum brevis

A

flexes 2nd through 5th digits

38
Q

flexor halluces brevis

A

flexes proximal phalanx of 1st digit

39
Q

lumbricals

A

flexes proximal phalanges at MTP joint, extends phalanges at PIP and DIP joins

40
Q

plantar interossei

A

adducts digits 2-4 and flexes metatarsophalangeal

41
Q

quadratus plantae

A

corrects for oblique pull of flexor digitorum longus tendon, thus assisting in flexion of toes

42
Q

gastrocnemius

A

plantar flexes foot at ankle joint, assists in flexion of knee joint, raises heal during walking

43
Q

plantaris

A

weakly assists gastrocnemius

44
Q

popliteus

A

weakly flexes knee and unlocks it by rotating femur on fixed tibia

45
Q

soleus

A

plantar flexes foot at ankle, stabilizes leg over foot

46
Q

tibialis posterior

A

plantar flexes foot at ankle and inverts foot