Musculoskeletal system - pelvis Flashcards
What is the pelvis defined by?
The pelvis is defined by the hip bones with the sacrum in between
What happens at birth to the hip bones?
At birth each hip bone is made up of three different bones which are united at the acetabumen by a Y-shaped triradiate cartilage. These three bones are the pubis, Ilium and ischium
Name the parts of the pelvis
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What are the two parts of the pelvis?
Identify these on the diagram
The greater pelvis and the lesser pelvis
What is the pelvic cavity continuous with?
The pelvic cavity is continuous superiorly with the abdominal cavity, inferiorly is bounded by two diaphragms (pelvic and urogenital) – acts as supports and sphincters for pelvic viscera.
What is the lesser pelvis continuous with?
The pelvis is completed inferiorly by the urogenital diaphragm and the pelvic floor
What is the superior pelvic aperture?
The border around the greater pelvis
What is the inferior aperture?
the border around the lesser pelvis (flip the pelvis upside down to see this border)
Locate the obturator foramen, the greater and lesser sciatic notch and subpubic angle
On image
What are the 3 bones of the pelvis and locate them?
- Ilium
- Pubis
- Triradiate cartilage cartilage
In adult life what do the pelvic bones do?
In adult life these bones all fuse to form a continuous hip bone. In children cartilage is found between these bones.
What is the Pubic symphysis?
The midline secondary cartilaginous joint uniting the bodies of the left and right pubic bones
Describe the lateral and medial view of the pelvis
On image
Locate the AIIS and PIIS
On image
How is the pelvis orientated?
The pelvis is tilted anteriorly.
