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BMSc anatomy > regional gross anatomy lower limb innervation > Flashcards

regional gross anatomy lower limb innervation Flashcards

1
Q

what nerve supplies the anterior compartment of the thigh?

A

the femoral nerve

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2
Q

what are the nerve roots of the femoral nerve?

A

L2-4

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3
Q

what is the innervation of iliacus?

A

the femoral nerve

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4
Q

what is the innervation of posts major?

A

anterior rami of L1-L3 spinal nerves

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5
Q

what is the innervation of pectineus?

A

the femoral nerve (l2,3)

occasionally there is a branch of obturator to pectineus as well but typically supplied by the femoral nerve

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6
Q

what is the innervation of sartorius?

A

the femoral nerve (l2,3)

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7
Q

what is the innervation of quadriceps muscles?

A

the femoral nerve (l2,3,4)

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8
Q

what is the terminal branch of the femoral nerve?

A

the saphenous nerve

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9
Q

explain the course of the saphenous nerve and its innervation

A

it travels down medially to pass on the medial side of the knee joint

gives cutaneous innervation to the skin overlying the anteromedial aspect of the knee and the leg and foot

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10
Q

what nerve innervates the medial compartment of the thigh?

A

the obturator nerve

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11
Q

what are the nerve roots of the obturator nerve?

A

L2,3,4

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12
Q

what is the innervation of gracilis?

A

the obturator nerve (l2,3)

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13
Q

what is the innervation of adductor longus?

A

L2,3,4

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14
Q

what is the innervation of adductor brevis?

A

L2,3,4

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15
Q

what is the innervation of adductor magnus?

A

L2,3,4

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16
Q

what is the innervation of obturator externus?

A

obturator nerve (L3,4)

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17
Q

explain the course of the obturator nerve

A

it runs along the lateral wall of the pelvis and then through the obturator canal to access the medial compartment of the thigh

it enters the medial compartment and divides into anterior and posterior branches

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18
Q

which 3 muscles does the anterior branch of the obturator nerve supply?

A

adductor longus
adductor brevis
gracilis

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19
Q

which 2 muscles does the posterior branch of the obturator nerve supply?

A

adductor magnus
obturator externus

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20
Q

explain the course of the saphenous nerve

A

travels w/in the adductor canal to reach the anteromedial aspect of the knee

it does not go through the adductor hiatus but instead travels distally and then passes between sartorius and gracilis to come into a more superficial position so it can supply the anteromedial aspect of the knee leg and foot

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21
Q

what forms the adductor hiatus

A

an opening in the adductor longus muscle

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22
Q

what nerve supplies gluteus maximus?

A

the inferior gluteal nerve (L5, S1, S2)

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23
Q

what nerve supplies tensor fascia latae?

A

the superior gluteal nerve (L4, L5, S1)

24
Q

what nerve supplies gluteus medius?

A

superior gluteal nerve (L4, L5, S1)

25
Q

what nerve supplies gluteus minimus?

A

superior gluteal nerve (L4, L5, S1)

26
Q

what is the innervation of piriformis?

A

anterior rami of S1, S2

27
Q

what nerve supplies obturator internus?

A

nerve to obturator internus (L5, S1)

28
Q

what nerve supplies the superior gemellus?

A

nerve to obturator internus (L5,S1)

29
Q

what nerve supplies the inferior gemellus?

A

nerve to quadratus femroris (L5, S1)

30
Q

what nerve supplies quadratus femoris?

A

nerve to quadratus femoris (L5, S1)

31
Q

what nerve supplies obturator externus?

A

obturator nerve (L3, L4)

32
Q

explain the course of the sciatic nerve

A

forms w/in the pelvic cavity and exited via the greater sciatic foramen and will pass through the gluteal region

it does not supply anything in the gluteal region, just passes through it and travels down into the posterior thigh

33
Q

what are the 2 branches that the sciatic nerve branches into?

A

tibial nerve (L4-S3)
common peroneal nerve (L4-S2)

34
Q

what nerve runs adjacent to the sciatic nerve?

A

the posterior cutaneous nerve of the thigh (S1, S2, S3)

35
Q

explain the course of the posterior cutaneous nerve of the thigh

A

it extends down and primarily supplies the skin covering the posterior thigh

also gives off a number of branches to supply the skin covering the inferior half of the buttock - these are the clunial nerves

36
Q

what are the nerves supplying the posterior aspect of the sacrum?

A

the middle clunial nerves (S1, S2, S3)

37
Q

what nerves supply the upper half of the buttock?

A

superior clunial nerves (posterior rami of L1, L2, L3)

38
Q

what nerve innervates the posterior compartment of the thigh?

A

the tibial division of the sciatic nerve (L4 - S3)

39
Q

what nerve innervates semimembranosus?

A

tibial division of sciatic nerve (L5, S1, S2)

40
Q

what nerve innervates semitendinosus?

A

tibial division of sciatic nerve (L5, S1, S2)

41
Q

what nerve innervates the short head of biceps femoris?

A

common peroneal division of sciatic nerve (L5, S1, S2)

42
Q

what nerve innervates the long head of biceps femoris?

A

tibial division of sciatic nerve (L5, S1, S2)

43
Q

explain the course of the sciatic nerve once it is in the gluteal region

A

it enters the gluteal region inferior to the performs muscle

it then passes down into the posterior compartment of the thigh, passing deep to the long head of biceps femoris

w/in the thigh it runs in the midline of the posterior compartment and divides into terminal branches of the tibial nerve and the common peroneal nerve

44
Q

where does the division of the sciatic nerve normally occur?

A

as the nerve enters the popliiteal fossa

45
Q

what nerve supplies the anterior compartment of the leg?

A

the deep peroneal nerve (L4,5)

46
Q

what nerve innervates tibias anterior?

A

the deep peroneal nerve (l4,5)

47
Q

what nerve innervates extensor digitorum longus?

A

the deep peroneal nerve (l4,5)

48
Q

what nerve innervates peroneus tertius?

A

the deep peroneal nerve (l4,5)

49
Q

what nerve innervates extensor hallicus longus?

A

the deep perineal nerve (l4,5)

50
Q

what nerve innervates the lateral compartment of the leg?

A

the superficial peroneal nerve (L5, S1, S2)

51
Q

what nerve innervates peroneus longus?

A

the superficial perineal nerve (L5, S1, S2)

52
Q

what nerve innervates peroneus brevis?

A

the superficial peroneal nerve(L5, S1, S2)

53
Q

what nerve innervates the dorsum of the foot?

A

the deep peroneal nerve (L5, S1)

54
Q

what nerve innervates extensor digitorum brevis?

A

the deep perineal nerve (L5,S1)

55
Q

what nerve innervates extensor hallicus brevis?

A

the deep perineal nerve (L5,S1)

56
Q

what nerve supplies the majority of the anterior leg w/ cutaneous innervation?

A

the saphenous nerve

BMSc anatomy (8 decks)

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