6.2 Bones and Joints of the Pelvis Flashcards
How is the pelvis divided into?
False greater pelvis and True lesser pelvis
What makes the division between the false and true pelvis?
The iliopectineal line
What type of pelvis is found in the majority of women?
Gynaecoid pelvis
What are the differences between the female and male pelvis?
Female pelvis is wider than longer and has a wide sub-pubic arch.
Male pelvis is longer and has a heart-shaped inlet
Name the three bones of the pelvis
Ilium, ischium and pubis
What ligaments stabilize the pelvis?
Interosseous sacroiliac ligament, sacrospinous ligament, sacrotuberous ligament
What is the insertion and origin of the interosseous sacroiliac liagment?
Sacrum to the Ilium
What is the insertion and origin of the Sacrotuberous ligament?
Middle of sacrum to the lesser sciatic noth
What is the insertion and origin of the sacrospinous ligament?
End of the sacrum to the greater sciatic notc
What are the two triangles that make up the pelvic outlet?
Urogenital triangle and the Anal triangle
Describe the Urogenital triangle
Anterior pelvic outlet and has boundaries made of bone
Describe the Anal triangle
Posterior pelvic outlet and has ligamentous boundaries
Describe the 2 bone arches
One greater one for weight bearing when standing, one smaller for weight bearing when sitting
Where is the center of rotation in the sacrum?
At S2
Reverse keystone effect?
Where the sacrum sinks down between the iliac bones pulling the ligaments tighter securing the joint more
