Michelle,

I agree that if a patient has a lack of stiffness in that region, one may not be inclined to give AS a thought. I can also agree that AS likely does not cause SI joint instability. I would venture to guess that SI joint instability could have many possible causes. However, I'm not sure that it is valid to assert that what is causing AS isn't causing any SI joint instability. They may be part of the same disease process, they may not. I really don't know.

Could you please provide citations to support absolute statements such as "...there's an absence of stiffness in that region (SI region) because that is where AS symptoms begin..."? I can't say that I've ever read information that supports all AS symptoms originating in the SI region.

Also, I'm not sure that stiffness equals immobility. Fusion may eventually cause immobility, but just because stiffness of a joint exists, regardless of it's location in the body, doesn't mean that it's rendered immobile.

Kind Regards,
Jay

Almost all of us long for peace and freedom; but very few of us have much enthusiasm for the thoughts, feelings, and actions that make for peace and freedom. - Aldous Huxley

Was the government to prescribe to us our medicine and diet, our bodies would be in such keeping as our souls are now. - Thomas Jefferson