Piriformis landmarks and trochanteric anasatomoses (dave's notes) Flashcards
What is found above piriformis?
The superior gluteal nerve and vessels
What is found below piriformis?
The inferior gluteal nerve and vessels
pudendal nerve and vessels
nerve to obturator internus
sciatic nerve - posterior femoral cutaneous on the surface and nerve to quadriceps femoris deep
Describe the inferior gluteal nerve
Short course, enters muscle, no cutaneous branches.
What does the inferior gluteal artery supply?
Piriformis, obturator internus, gluteus maximus, and has anastomotic branches
What is the course of the pudendal nerve?
Brief appearance below piriformis. Turns forward around the sacrospinous ligament and passes forward in the less sciatic foramen
Where is the internal pudendal artery found?
Follows the internal pudendal nerve, on its lateral side
Where is the nerve to obturator internus found?
This lies further lateral than the internal pudendal nerve??, loops around the base of the ischial spine.
Describe the course of the sciatic nerve.
Emerges lateral to the inferior gluteal, lying on the ischium over the posterior aspect of the acetabulum, then passes vertically downwards to the hamstring compartment. Tibial and common peroneal parts usually divide in the pelvis
Where is the posterior femoral cutaneous nerve found?
This lies on top of the sciatic nerve and then passes down into the lower limb
Where is the nerve to quadriceps femoris found?
This is deep to the sciatic nerve (articular branch??), sinking deep into quadriceps femoris.
What forms the trochanteric anastomoses?
- Descending branch of superior gluteal artery
2. Ascending branch of circumflex femoral arteries (+inferior gluteal artery)
What is the main sours of blood supply to the head of the femur?
The trochanteric anastomoses, lying-in the trochanteric fossa
