The Sacral Plexus, Sciatic Nerve and Branches Flashcards
What are the roots of the sacral plexus?
L4-S4
Where is the sacral plexus found?
Anterior to the piriformis
What are the two main branches of the sacral plexus?
Sciatic nerve
Pudendal nerve
What is the lumbosacral trunk formed from?
The union of L4 and L5
What are the two pairs of gluteal nerves?
The superior and inferior gluteal nerves
What is the root value of the superior gluteal nerve?
L4-S1
What muscles are supplied by the superior gluteal nerve?
Gluteus medius
Gluteus minimus
Tensor fasciae latae
What is the root value of the inferior gluteal nerve?
L5-S2
Which muscle does the inferior gluteal nerve supply?
Gluteus maximus
What is the sciatic nerve a continuation of?
The main part of the sacral plexus
Where does the sciatic nerve emerge in the gluteal region?
Inferior to piriformis
What are the two terminal branches of the sciatic nerve?
Tibial nerve
Common fibular nerve
Which muscles in the gluteal region does the sciatic nerve supply?
None of them
Identify the structures labelled 1-5
1- Long head of biceps femoris
2- Tibial nerve
3- Piriformis
4- Sciatic nerve
5- Common fibular nerve
