Pelvic Walls and Floor Flashcards
What are the posterior and anterior pelvic boundaries?
Bony walls
What is the lateral pelvic boundary?
Bony and muscular walls
What is the inferior pelvic boundary?
Muscular at the pelvic outlet
What is the superior pelvic boundary?
Is the inlet to the abdominal cavity
What is the function of the greater and lesser sciatic notches?
To allow the passage of nerves, arteries, veins and muscles from the internal surface of the pelvis to the perineum and gluteal region
What turns the sciatic notches into foramen?
The presence of ligaments
What foramen allows the anterior part of the pelvis to be lighter?
Obturator foramen
What structures keep the foramen closed?
- Obturator internis
- Obturator externis
- Obturator membrane
The obturator foramen is pierced by what structures?
Obturator nerve and vessels
What structure is a bony landmark for the pudendal nerve?
Ischial spine
What is the name of the bone at the site of the hip joint where the ball and socket joint forms with the femur?
Acetabulum
What do the iliac blades provide attachment for anteriorly and posteriorly?
Anterior - iliacus
Posterior - gluteus muscles
What structures of the pelvis are attachment sites for the inguinal ligament?
Anterior superior iliac spine
Pubic tubercle
What nerves pass through the sacral foramen to exit the vertebral column and supply the structures within the pelvis and lower limb?
Sacral nerves
What two large ligaments attach to the sacrum?
- Sacrotuberous
- Sacrospinous
What is the distal attachment of the sacrotuberous ligament?
The ischial tuberosity
What is the distal attachment of the sacrospinous ligament?
The ischial spine
Together, the sacrospinous and sacrotuberous form what strcuture?
The greater and lesser sciatic foramen
How is the inguinal ligament formed?
The aponeurosis of external oblique as it rolls over itself to form the anterior wall and floor of the inguinal canal
What type of joint is the anterior sacroiliac joint and what ligament protects it?
Plane synovial joint protected by the anterior sacroiliac ligament