Self Quiz 1 Pelvic Girdle Bony Landmarks PDF

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Quiz questions about practical thinking of the anatomy of the pelvic bones. ...

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Pelvic Girdle Bony Landmarks 1. Why is the anatomical shape of the sacrum increase the stability of the pelvic girdle? The sacrum is triangular and shaped like a keystone. Thus the weight of the upper body will push the sacrum down increasing stability between the two innominate bones.

2. As an Athletic Therapist why is it important to note that sacrum does not fuse until after the age of 20? The sacrum is made up of 5 vertebrae that fuse after the age of 20. This is significant due to the number of falls on the sacrum and coccyx. The dura runs all the way down to attach coccyx.

3. Why is the dorsum of the sacrum rough? The dorsum of the sacrum is rough for muscle and ligamentous attachments.

4. How does the anatomical shape of the auricular surfaces of the sacrum and ilium increase the stability of the sacroiliac joint? The surfaces are irregular, changing shape from convexity and concavity between S1-3. This increases the stability much the placing your knuckles of one hand in between the knuckles of your other hand. 5. Why is the iliac crest thicker than the rest of the ilium? The iliac crest needs to be thicker as a number of abdominal muscles attach here. These muscles are important and they generate lots of rotational forces while running thus there is a need for increased bony attachment. 6. When looking at the bony components of the symphysis pubis would you say that the joint has more mobility or stability? There is minimal bony stability superior and inferiorly. Thus the joint requires other structures, like muscles and ligaments, for stability....