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Phi Lambda Delta OS 203 Flashcards > Lower Extremities Qs > Flashcards

Lower Extremities Qs Flashcards

1
Q

What innervates the pectineus?

A

Femoral nerve (L2, L3)

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2
Q

What is the action of the pectineus?

A

Adducts and flexes thigh; assists with medial rotation

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3
Q

What innervates the iliopsoas?

A

Anterior rami fo lumbar nerves (L1, L2, L3)

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4
Q

What muscle stabilizes the hip joint?

A

Iliopsoas - also main hip flexor

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5
Q

What innervates the sartorius?

A

Femoral nerve (L2, L3)

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6
Q

What is the action of the sartorius?

A

Flexes, abducts, and laterally rotates at hip joint

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7
Q

The quadriceps femoris is composed of which four muscles?

A

Rectus femoris

vastus lateralis

vastus medialis

vastus intermedius

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8
Q

What innervates the rectus femoris?

A

Femoral nerve (L2, L3)

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9
Q

What innervates the vastus lateralis?

A

Femoral nerve (L2, L3)

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10
Q

What innervates the vastus medialis?

A

Femoral nerve (L2, L3)

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11
Q

What innervates the vastus intermedius?

A

Femoral nerve (L2, L3)

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12
Q

What is the action of the quadriceps femoris?

A

Knee extensor

Flexes thigh

Steadies hip joint

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13
Q

The hamstrings are composed of which three muscles?

A

Semitendinosus

Semimembranosus

Biceps femoris

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14
Q

What innervates the adductor longus?

A

Anterior division of obturator nerve (L2, L3, L4)

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15
Q

What innervates the adductor brevis?

A

Anterior and posterior branches of the obturator nerves (L2, L3, L4)

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16
Q

What innervates the adductor magnus?

A

Adductor part by posterior division of obturator nerve; hamstring part by tibial part of sciatic nerve (L4)

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17
Q

What is the action of the adductor longus?

A

Flexes thigh

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18
Q

What is the action of the adductor brevis?

A

Flexes thigh

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19
Q

What is the action of the adductor magnus?

A

Flexes thigh

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20
Q

What innervates the gracilis?

A

Obturator nerve (L2, L3)

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21
Q

What innervates the obturator externus?

A

Obturator nerve (L3, L4)

22
Q

What is the action of the gracilis?

A

Flexes leg

Medially rotates leg

23
Q

What is the action of the obturator externus on the thigh?

A

Lateral rotation

24
Q

What innervates the semitendinosus?

A

Tibial division of sciatic nerve part of tibia (L5, S1, S2)

25
Q

What innervates the semimembranosus?

A

Tibial division of sciatic nerve part of tibia (L5, S1, S2)

26
Q

What innervates the biceps femoris?

A

Tibial division of sciatic nerve for the long head; common fibular division of sciatic nerve for short head

27
Q

What is the action of the semitendinosus?

A

Extends the trunk when flexed

28
Q

What is the action of the semimembranosus?

A

Extends the trunk when flexed

29
Q

What innervates the gluteus maximus?

A

Inferior gluteal nerve (L5, S1, S2)

30
Q

What innervates the gluteus medius?

A

Superior gluteal nerve (L5, S1)

31
Q

What is the action of the gluteus maximus?

A

Abducts and rotates the thigh

32
Q

What is the action of the gluteus medius?

A

Abducts and rotates the thigh

33
Q

What innervates the tibialis anterior?

A

Deep fibular nerve (L4, L5)

34
Q

What innervates the extensor digitorum longus?

A

Deep fibular nerve (L4, L5)

35
Q

What innervates the extensor hallucis longus?

A

Deep fibular nerve (L4, L5)

36
Q

What innervates the fibularis/peroneus tertius?

A

Deep fibular nerve (L4, L5)

37
Q

What is the action of the tibialis anterior?

A

Inverts foot

38
Q

What is the action of the extensor digitorum longus?

A

Extends lateral four digits

39
Q

What is the action of the extensor hallucis longus?

A

Extends great toe

40
Q

What is the action of the fibularis/peroneus tertius?

A

Everts foot

41
Q

In what compartment of the leg can you find the fibularis/peroneus longus and brevis?

A

Lateral compartment of the leg

42
Q

What innervates the fibularis/peroneus longus and brevis?

A

Superficial fibular nerve (L5, S1, S2)

43
Q

What is the action of the fibularis/peroneus longus and brevis?

A

Weak plantarflexion of ankle

44
Q

Give three superficial muscles reponsible for ankle plantarflexion.

A

Gastrocnemius, soleus, plantaris

45
Q

Give four deep muscles found in the posterior compartment of the leg.

A

Popliteus, flexor hallucis longus, flexor digitorum longus, tibialis posterior

46
Q

What innervates the abductor hallucis and flexor digitorum brevis?

A

Medial plantar nerve (S2, S3)

47
Q

In which layer of the sole can you find the lumbricals?

A

2nd layer

48
Q

What is the action of the flexor hallucis brevis?

A

Flexes proximal phalanx of 1st digit

49
Q

Which digits are adducted by the plantar interossei?

A

3rd to 5th

50
Q

Give two muscles that extend the foot.

A

Extensor digitorum brevis, extensor hallucis brevis

51
Q

components of the Pes anserinus

A

From medial to lateral:

Sartorius

Gracilis

Semitendinosus

“Some Great Tendons”

Phi Lambda Delta OS 203 Flashcards (4 decks)

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