The Sacral Plexus, Sciatic Nerve and Branches Flashcards

1
Q

What are the roots of the sacral plexus?

A

L4-S4

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2
Q

Where is the sacral plexus found?

A

Anterior to the piriformis

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3
Q

What are the two main branches of the sacral plexus?

A

Sciatic nerve

Pudendal nerve

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4
Q

What is the lumbosacral trunk formed from?

A

The union of L4 and L5

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5
Q

What are the two pairs of gluteal nerves?

A

The superior and inferior gluteal nerves

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6
Q

What is the root value of the superior gluteal nerve?

A

L4-S1

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7
Q

What muscles are supplied by the superior gluteal nerve?

A

Gluteus medius

Gluteus minimus

Tensor fasciae latae

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8
Q

What is the root value of the inferior gluteal nerve?

A

L5-S2

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9
Q

Which muscle does the inferior gluteal nerve supply?

A

Gluteus maximus

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10
Q

What is the sciatic nerve a continuation of?

A

The main part of the sacral plexus

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11
Q

Where does the sciatic nerve emerge in the gluteal region?

A

Inferior to piriformis

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12
Q

What are the two terminal branches of the sciatic nerve?

A

Tibial nerve

Common fibular nerve

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13
Q

Which muscles in the gluteal region does the sciatic nerve supply?

A

None of them

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14
Q

Identify the structures labelled 1-5

A

1- Long head of biceps femoris

2- Tibial nerve

3- Piriformis

4- Sciatic nerve

5- Common fibular nerve

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