Thank you for the links, DrF.
Because of your comment about causation, I read the article again. I do agree with you that tight neck muscles don't cause AD--originally, I didn't think the article said they do cause AD, just that stretching tight muscles would help those with AD. Upon closer reading, though, near the end of the article, there is a confusing sentence that says tight muscles can cause the disease, but I wonder if that isn't a typo because the removal of one word changes the sentence to support what the rest of the article says.
Thank you again, DrF. Your opinions through the years have been extremely helpful in guiding me and many others. TiMS is very lucky to have this trusted thread.
Now I'm off to google The Changing Fist, The Changing Palm, The Emperor's Brocade, and Eight Treasures.