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MSK Week 3 > Lumbosacral Plexus and Vasculature > Flashcards

Lumbosacral Plexus and Vasculature Flashcards

1
Q

the aorta divides into what in the lower part of the body?

A

right and left common iliac arteries

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2
Q

what level of spinal column does the aorta divide?

A

L4

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3
Q

common iliac arteries branch into what?

A

internal and external iliac arteries

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4
Q

what does the external iliac artery become? when does the name change?

A

femoral artery once it passes under the inguinal ligament

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5
Q

how does the internal iliac artery branch?

A

into an anterior and posterior division

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6
Q

what does the anterior division of the internal iliac artery provide?

A

pelvic viscera structures in the perineum

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7
Q

what is the perineum?

A

external genitalia

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8
Q

what does the posterior division of the internal iliac artery provide?

A

gluteal muscles/region
lower back
sacral nerves

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9
Q

name the three branches of the posterior division of the internal iliac artery

A

iliolumbar
lateral sacral
superior gluteal

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10
Q

what does the iliolumbar artery provide?

A

psoas muscle

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11
Q

what does the lateral sacral artery provide?

A

meninges/spinal roots

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12
Q

what does the superior gluteal artery provide?

A

gluteal muscles

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13
Q

name the three branches of the internal iliac anterior division to know

A

obturator
inferior gluteal
internal pudendal

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14
Q

what does the obturator artery provide? what is it a branch of?

A

medial thigh muscles

branch of the anterior division of the internal iliac

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15
Q

what does the inferior gluteal artery provide? what is it a branch of?

A

gluteal muscles

branch of the anterior division of the internal iliac

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16
Q

what does the internal pudendal artery provide? what is it a branch of?

A

perineum

branch of the anterior division of the internal iliac

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17
Q

the lumbar portion of the lumbosacral plexus is considered to include ventral rami of what spinal roots?

A

L1 to L4

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18
Q

name the nerve that is a branch of off the L1 ventral rami

A

ilioinguinal nerve

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19
Q

what is the spinal root of the ilioinguinal nerve?

A

L1

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20
Q

what does the ilioinguinal nerve do?

A

sensation in scrotum/labia majora

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21
Q

the lateral femoral cutaneous nerve has what spinal roots?

A

L2 and L3

22
Q

what is the role of the lateral femoral cutaneous nerve?

A

sensation to anterolateral thigh

23
Q

what is a common nerve to get impinged in the inguinal ligament area?

A

lateral femoral cutaneous nerve

24
Q

the genitofemoral nerve has what spinal roots?

A

L1 and L2

25
Q

name the branches of the genitofemoral nerve

A

genital and femoral

26
Q

what is the action of the femoral branch of the genitofemoral nerve?

A

sensation to small area of proximal/anterior thigh

27
Q

what is the action of the genital branch of the genitofemoral nerve?

A

traverses inguinal canal and innervates the scrotum/ labia majora

28
Q

what two major nerves have spinal roots of L234?

A

femoral nerve

obturator nerve

29
Q

what is the femoral nerves spinal roots?

A

L234

30
Q

what is the obturator nerves spinal roots?

A

L234

31
Q

what is the action of the femoral nerve?

A

innervates the anterior thigh muscles

32
Q

what is the action of the obturator nerve?

A

innervates the medial thigh muscles (adductors)

33
Q

where does the obturator nerve pass through?

A

the obturator canal

34
Q

the sacral plexus is considered to be what nerve roots?

A

L4 L5 S1234

35
Q

what is the lumbosacral trunk?

A

nerve branch of the sacral plexus

36
Q

what are the nerve roots of the lumbosacral trunk?

A

L4 and L5

37
Q

what is the action of the lumbosacral trunk?

A

joins with the large sacral nerves

38
Q

what is the sciatic nerve roots?

A

union of L4, L5 S123

39
Q

what is the role of the sciatic nerve?

A

innervate many lower extremity muscles

40
Q

what is the biggest nerve in the body?

A

sciatic nerve

41
Q

what are the nerve roots of the superior gluteal nerve?

A

L45 and S1

42
Q

what are the nerve roots of the inferior gluteal nerve?

A

L5 S1 S2

43
Q

what is the action of the superior gluteal nerve?

A

innervates hip abductors

44
Q

what is the action of the inferior gluteal nerve?

A

innervated gluteus maximus

45
Q

what are the nerve roots of the posterior femoral cutaneous nerve?

A

S123

46
Q

what is the action of the posterior femoral cutaneous nerve?

A

sensory innervation to the posterior thigh region

47
Q

what are the nerve roots of the pudendal nerve?

A

S234

48
Q

what two canals does the pudendal nerve traverse?

A

exits the greater sciatic foramen and enters the lesser sciatic foramen

49
Q

what is the action of the pudendal nerve?

A

innervates the perineum

50
Q

name the five nerves of the lumbar plexus

A 
ilioinguinal nerve
lateral femoral cutaneous nerve
genitofemoral nerve
femoral nerve
obturator nerve
51
Q

name the six nerves of the sacral plexus to know

A 
sciatic nerve 
lumbosacral trunk
superior gluteal nerve
inferior gluteal nerve 
posterior femoral cutaneous nerve 
pudendal nerve

MSK Week 3 (10 decks)

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