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PNS exam 3 > Sacral Plexus > Flashcards

Sacral Plexus Flashcards

0
Q

The contributions from L4 and L5 are by way of what

A

lumbosacral trunk

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1
Q

The sacral plexus is formed by the anterior primary rami of what

A

L4, L5, S1-S3, and part of S4

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2
Q

The sacral plexus forms the anterior surface of what muscle

A

Piriformis

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3
Q

What structure do the sacral nerve roots exit from

A

IVF/ Sacral foramen

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4
Q

Nerve roots that contribute to the sacral plexus divide into what

A

anterior division

posterior division

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5
Q

The nerve to the quadratus femoris and gemellus inferior from the anterior division contain fibers from

A

L4, L5, and S1

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6
Q

The nerve to the quadratus femoris and gemellus inferior from the anterior division leave the pelvis through what opening

A

greater sciatic foramen

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7
Q

The quadratus femoris and gemellus inferior muscles contribute to what 2 actions of the thigh

A

lateral rotation and adduction

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8
Q

The nerve to the obturator internus and gemellus superior from the anterior division carries fibers from

A

L5, S1 and S2

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9
Q

The nerve to the obturator internus and gemellus superior leave the pelvis through what opening

A

greater sciatic foramen

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10
Q

Once through the greater sciatic foramen, the nerve to the obturator internus and gemellus superior gives off branches to what muscle

A

gemellus superior

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11
Q

The nerve to the obturator internus and gemellus superior then reenters the pelvis via _______ and supplies the obturator internus

A

lesser sciatic foramen

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12
Q

The obturator internus and gemellus superior contribute to what 2 actions of the thigh

A

lateral rotation and abduction

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13
Q

Pudendal nerve of the anterior division contains fibers from where

A

S2, S3, and S4

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14
Q

The pudendal nerve leaves the pelvic cavity via what opening

A

greater sciatic foramen

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15
Q

The pudendal nerve goes into the perineum via what opening

A

lesser sciatic foramen

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16
Q

The pudendal nerve travels to the penis and clitoris via what structure

A

pudendal canal

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17
Q

Names of branches off the pudendal nerve with in the pudendal canal

A

inferior rectal nerve
perineal nerve
dorsal nerve of the penis
dorsal nerve of the clitoris

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18
Q

The inferior rectal nerve carry what type of information

A

sensory info to anus

motor info to external anal spincter

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19
Q

The perineal nerve given off by the pudendal nerve divides into what

A

deep and superficial branches

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20
Q

The superficial branch of the perineal nerve carries what type of fibers

A

sensory

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21
Q

What is the name of the terminal branch of the pudendal nerve

A

dorsal nerve of the penis (male)

dorsal nerve of the clitoris (female)

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22
Q

Individual muscular branches off the sacral plexus contains fibers from where

A

S4

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23
Q

Pelvic splancnic nerve contains fibers from where

A

S2, S3, S4

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24
Q

The nerve to the piriformis carries fibers from where

A

S1 and S2

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25
Q

The superior gluteal nerve is made up of fibers from where

A

L4, L5, S1

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26
Q

The superior gluteal nerve leaves the pelvis through what opening

A

greater sciatic foramen

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27
Q

The superior gluteal nerve splits into what two branches

A

superior branch

inferior branch

28
Q

The inferior gluteal nerve carries fibers from where

A

L5, S1, and S2

29
Q

The inferior gluteal nerve leaves the pelvis through what opening

A

greater sciatic foramen

30
Q

The perforating cutaneous nerve contains fibers from

A

S2 and S3

31
Q

How did the perforating cutaneous nerve get its name

A

it travels through the sacrotuberous ligament, ultimately reaching the lower medial aspects of the buttocks

32
Q

The perforating cutaneous nerve may be formed by a branch off of which nerve

A

pudendal nerve

33
Q

The posterior cutaneous nerve of the thigh is formed by fibers from the anterior division _________ and posterior division _________

A

anterior (S2, S3)

posterior (S1, S2)

34
Q

The posterior cutaneous nerve of the thigh leaves the pelvis through what opening

A

the greater sciatic foramen

35
Q

What does the posterior cutaneous nerve of the thigh communicate with in the inferior leg

A

sural nerve

36
Q

What is the largest nerve in the human body

A

Sciatic nerve

37
Q

How thick is the sciatic nerve

A

2 cm

38
Q

The sciatic nerve is actually a combination of 2 nerves. what nerves are they

A

tibial nerve

common fibular nerve

39
Q

The tibial nerve is located where in respect to the common fibular nerve

A

tibial nerve is medial

fibular nerve is lateral

40
Q

The tibial nerve is formed by the anterior division of what

A

L4-S3 nerves

41
Q

The common fibular nerve is formed from the posterior division of

A

L4-S2 nerves

42
Q

The sciatic nerve leaves the pelvis within what structure

A

common sheath

43
Q

The sciatic nerve leaves the pelvis through what opening below the piriformis muscle

A

greater sciatic foramen

44
Q

Approximately 2/3 of the way to the knee, the sciatic nerve will split into what

A

common fibular and tibial components

45
Q

The common fibular nerve is composed of what fibers

A

L4-S2 nerves

46
Q

Upon reaching the antero-lateral aspect of the leg, the common fibular nerve gives off what branch to the knee joint

A

an articular branch

47
Q

Two sensory branches are given off as the common fibular nerve courses along the lateral aspect of the popliteal fossa. what are they

A

lateral sural cutaneous nerve

fibular communicating branch

48
Q

the fibular communicating branch of the common fibular nerve in addition with the medial sural cutaneous nerve form what nerve

A

sural nerve

49
Q

The common fibular nerve divides into what two nerves

A

superficial fibular nerve

deep fibular nerve

50
Q

The superficial fibular nerve splits into what two nerves

A

medial dorsal cutaneous nerve

intermediate dorsal cutaneous nerve

51
Q

the medial dorsal cutaneous nerve and the intermediate dorsal cutaneous nerve supply all of the skin over the dorsum of the foot except where

A

skin between the first two toes

52
Q

The deep fibular nerve is primarily _________in nature

A

muscular

53
Q

the terminal branch of the deep fibular nerve supplies the sensory supply for what on the foot

A

first two toes

54
Q

Clinical considerations for the common fibular nerve

A

steppage gait

55
Q

The tibial nerve is made up of fibers from

A

L4-S3

56
Q

Which is larger, the common fibular nerve or the tibial nerve

A

tibial nerve is considerably larger

57
Q

In the popliteal fossa, the tibial nerve gives off what type of branches that supply the knee joint

A

articular

58
Q

From the tibial nerve, the popliteal branch travels inferior to give rise to which nerve

A

interosseous nerve of the leg

59
Q

The tibial nerve gives rise to which two branch types

A

muscular branches

sensory branches

60
Q

The tibial nerve travels around the medial malleolus to the plantar surface of the foot and divides into what two terminal branches

A

medial plantar nerve

lateral plantar nerve

61
Q

The medial plantar nerve divides into what nerve

A

common plantar digital nerve

62
Q

The common plantar digital nerve gives motor supply to what

A

lumbricals 1 and 2

63
Q

The common plantar digital nerve gives sensory supply to skin between toes by way of what nerve

A

proper plantar digital nerves

64
Q

The lateral plantar nerve divides into what two branches

A

superficial branch

deep branch

65
Q

Clinical considerations of the tibial nerve

A

flexor paralysis
hammer toes
“claw foot”

66
Q

The coccygeal plexus is formed by the anterior rami of what

A

S4, S5, and Co1 nerves

67
Q

the nerves of the coccygeal plexus combine and give rise to what

A

anococcygeal nerves

68
Q

The anococcygeal nerves carry what type of information

A

sensory

PNS exam 3 (6 decks)

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