Gluteal Nerves/ Sacral Plexus Flashcards
The sacral plexus is covered by what anatomical landmark and are found atop what muscle?
They are covered by the branches of the internal iliac artery and lie directly atop the piriformis muscle.
What do all of the large branches of the sacral plexus exit through?
The greater sciatic foramen arising in the gluteal region.
What nerve fibers make up the sacral plexus?
The ventral primary rami of the lumbosacral trunk (L4-L5)
and S1-S4
So in total L4- S4
The ventral primary rami of the Lumbosacral trunk passes through what foramen?
Greater sciatic foramen
The nerves S1-S4 enter the pelvis through what foramen?
Enter the pelvis through the sacral foramina.
The nerves of the sacral plexus provide the muscles and skin of:
The gluteal region, the posterior thigh, the entire leg, and the entire foot.
The posterior devisions of the sacral plexus L4-S4 consist of what nerves?
Common peroneal Superior gluteal Inferior gluteal Posterior femoral cutaneous (partly) Nerve to piriformis
The nerves formed from the anterior devisions of the sacral plexus L4-S4 are?
Tibial nerve Obterator internus nerve Pudendal nerve Levator ani nerve Quadratus femoris nerve
What nerves attribute to the superior gluteal nerve?
L4-S1
Where does the superior gluteal nerve exit through and what is unique about where it exits?
The superior gluteal nerve exits through the greater sciatic foramen and is unique because it is the only branch from the sacral plexus that exits above the piriformis muscle!
What nerves attribute to the inferior gluteal nerve?
L5-S2 Injury to this nerve would affect the gluteus maximus.
What nerves attribute the sciatic nerve?
L4-5 and S1-3
The sciatic nerve branches into what two nerves?
The Tibial (Anterior devision) L4-S3 and the Common Peroneal (Posterior Devision) L4-S2
If there is any injury to the sciatic nerve will any of the gluteal muscles be affected?
No injury to the psiatic will not effect the gluteal muscles!
What nerves attribute to the posterior femoral cutaneous nerve?
S1-S3
