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PNS exam 3 > Sacral Plexus > Flashcards

Sacral Plexus Flashcards

(69 cards)

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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
The nerve to the piriformis carries fibers from where
S1 and S2
25
The superior gluteal nerve is made up of fibers from where
L4, L5, S1
26
The superior gluteal nerve leaves the pelvis through what opening
greater sciatic foramen
27
The superior gluteal nerve splits into what two branches
superior branch | inferior branch
28
The inferior gluteal nerve carries fibers from where
L5, S1, and S2
29
The inferior gluteal nerve leaves the pelvis through what opening
greater sciatic foramen
30
The perforating cutaneous nerve contains fibers from
S2 and S3
31
How did the perforating cutaneous nerve get its name
it travels through the sacrotuberous ligament, ultimately reaching the lower medial aspects of the buttocks
32
The perforating cutaneous nerve may be formed by a branch off of which nerve
pudendal nerve
33
The posterior cutaneous nerve of the thigh is formed by fibers from the anterior division _________ and posterior division _________
anterior (S2, S3) | posterior (S1, S2)
34
The posterior cutaneous nerve of the thigh leaves the pelvis through what opening
the greater sciatic foramen
35
What does the posterior cutaneous nerve of the thigh communicate with in the inferior leg
sural nerve
36
What is the largest nerve in the human body
Sciatic nerve
37
How thick is the sciatic nerve
2 cm
38
The sciatic nerve is actually a combination of 2 nerves. what nerves are they
tibial nerve | common fibular nerve
39
The tibial nerve is located where in respect to the common fibular nerve
tibial nerve is medial | fibular nerve is lateral
40
The tibial nerve is formed by the anterior division of what
L4-S3 nerves
41
The common fibular nerve is formed from the posterior division of
L4-S2 nerves
42
The sciatic nerve leaves the pelvis within what structure
common sheath
43
The sciatic nerve leaves the pelvis through what opening below the piriformis muscle
greater sciatic foramen
44
Approximately 2/3 of the way to the knee, the sciatic nerve will split into what
common fibular and tibial components
45
The common fibular nerve is composed of what fibers
L4-S2 nerves
46
Upon reaching the antero-lateral aspect of the leg, the common fibular nerve gives off what branch to the knee joint
an articular branch
47
Two sensory branches are given off as the common fibular nerve courses along the lateral aspect of the popliteal fossa. what are they
lateral sural cutaneous nerve | fibular communicating branch
48
the fibular communicating branch of the common fibular nerve in addition with the medial sural cutaneous nerve form what nerve
sural nerve
49
The common fibular nerve divides into what two nerves
superficial fibular nerve | deep fibular nerve
50
The superficial fibular nerve splits into what two nerves
medial dorsal cutaneous nerve | intermediate dorsal cutaneous nerve
51
the medial dorsal cutaneous nerve and the intermediate dorsal cutaneous nerve supply all of the skin over the dorsum of the foot except where
skin between the first two toes
52
The deep fibular nerve is primarily _________in nature
muscular
53
the terminal branch of the deep fibular nerve supplies the sensory supply for what on the foot
first two toes
54
Clinical considerations for the common fibular nerve
steppage gait
55
The tibial nerve is made up of fibers from
L4-S3
56
Which is larger, the common fibular nerve or the tibial nerve
tibial nerve is considerably larger
57
In the popliteal fossa, the tibial nerve gives off what type of branches that supply the knee joint
articular
58
From the tibial nerve, the popliteal branch travels inferior to give rise to which nerve
interosseous nerve of the leg
59
The tibial nerve gives rise to which two branch types
muscular branches | sensory branches
60
The tibial nerve travels around the medial malleolus to the plantar surface of the foot and divides into what two terminal branches
medial plantar nerve | lateral plantar nerve
61
The medial plantar nerve divides into what nerve
common plantar digital nerve
62
The common plantar digital nerve gives motor supply to what
lumbricals 1 and 2
63
The common plantar digital nerve gives sensory supply to skin between toes by way of what nerve
proper plantar digital nerves
64
The lateral plantar nerve divides into what two branches
superficial branch | deep branch
65
Clinical considerations of the tibial nerve
flexor paralysis hammer toes "claw foot"
66
The coccygeal plexus is formed by the anterior rami of what
S4, S5, and Co1 nerves
67
the nerves of the coccygeal plexus combine and give rise to what
anococcygeal nerves
68
The anococcygeal nerves carry what type of information
sensory

PNS exam 3 (6 decks)

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