That was a good article but I stand by my original thoughts.
Your article points out that it is in extreme cases not typical. The article is not from a medical journal. It is saying what some patients describe as happening, it doesn't demonstrate it as a function of the condition or as a criteria for diagnosis.

I would be interested in reading more about the movement disorder connection if you have more articles. I have a strange gait that I always attributed to hving walked in pain and the favorinf subsequent fractures. The thing I find odd is that in my home where I know the floor and subtlties I can ambulate short distance with out my crutches or chair. If I go out of the house I am a stumbling mess. I also find if I am in the dark I am throwing my feet around with no idea when they will hit the floor.