Lecture 16: Pelvic Girdle Flashcards
The pelvic girdle consists of:
The right and left hip bones and the sacrum
True or False
The Sacrum is part of the axial skeleton.
False, it is part of both the axial and appendicular skeletons.
What are the functions of the pelvic girdle?
Connect the lower limb to the axial skeleton
Transfer weight from the axial skeleton to the lower limb during standing and walking
Provide attachment site for strong muscles of the gluteal and abdominal regions
Provide support for pelvic organs
What are the hip bones formed by?
- ilium
- ischium
- pubis
When are the hip bones fully fused?
Not completely fused until after puberty
What is the acetabulum?
The socket for the head of the femur
What is the sacrum formed by?
5 fused verterbrae
What is the sacral canal a continuation of?
The vertebral canal
What does the sacral canal contain?
the cauda equina
What is the cauda equina?*
The bundle of spinal nerves that descends pas the distal end of the spinal cord
What is in the same vertical plane when in anatomical position?
the ASIS and the pubic symphysis
What is the function of the public symphysis?
It is in a position to support the weigh tof the bladder of the sacroiliac joints, so the pelvis has a tendency to rotate
What are the 2 ligaments that resist the rotation of the pelvis?
- sacrotuberous ligament
- sacrospinous ligament
Where is the sacroiliac joint?
Where the sacrum articulate with the left and right hip bones
What is the sacroiliac joint classified as?
Classified as a compound joint
- anteriorly, it is considered synovial
- posteriorly, it is less mobile and is classified as a syndesmosis
