Osteology of Pelvis and Posterior Abdominal Wall Flashcards
What is the pelvic girdle made up of?
Sacrum
2 Hip Bones
Which 3 bones fuse to form the hip bone?
Ilium
Ischium
Pubis
How many vertebrae fuse to form the sacrum?
5
What is the sacroiliac joint?
Where the sacrum meets the hip bone (specifically, the ilium)
What is the acetabulum?
The region of the hip bone that articulates with the head of the femur
What is the pubic symphysis?
Where the 2 hip bones meet
What shape is the pelvic girdle?
Basin-shaped
Which regions of the body does the pelvic girdle connect?
Vertebral column and lower limbs
Where do the 3 bones of the hip bone meet?
At the acetabulum
Which bones contribute to the obturator foramen?
Pubic bone and ischium
Where are the sciatic notches found?
Above and below the ischial spine
What bone region do we sit on?
The ischial tuberosities
What makes up the pubic arch?
The inferior pubic rami
At what vertebral level is the iliac crest found?
L4
Where do the sciatic foramina provide routes to?
Gluteal and posterior thigh regions
Which ligaments make up the sciatic foramina?
Sacrospinous ligament
Sacrotuberous ligament
Which ligament from the sacrum is deeper?
Sacrospinous ligament
Which direction does the sacrospinous ligament run?
Laterally
Which direction does the sacrotuberous ligament run?
Inferiorly
Which muscles make up iliopsoas?
Psoas major
Iliacus
Where does psoas major originate?
Lumbar vertebrae: bodies, intervertebral discs, transverse processes
Where does iliacus originate?
Iliac fossa
Where does iliopsoas insert?
Lesser trochanter of femur
Which actions does iliopsoas contribute to?
Flexes thigh at hip
Flexes vertebral column
Stabilizes hip joint
What is psoas major innervated by?
L2 - L4 anterior rami
Which nerve innervates iliacus?
Femoral nerve
Where does quadratus lumborum lie in relation to psoas major?
Laterally
Where does quadratus lumborum originate?
12th rib
Lumbar vertebrae: transverse processes
Where does quadratus lumborum insert?
Iliac crest
Which actions does quadratus lumborum contribute to?
Extends vertebral column
Laterally flexes vertebral column
Flexes 12th rib during inspiration
What is quadratus lumborum innervated by?
Anterior rami of T12 - L4
