I think in the areas that affect both, they may have had that affect. The MG seems to be more bulbar, in affecting my eyes and breathing, while the SPS has attacked my back and legs, though. In the last couple years, strenuous activity brings the MG out, but I think the SPS has been with me since childhood and the MG is more recent, maybe because the SPS was never caught and treated.

I thought the SPS went back to about sixth grade, but my parent tell me that I had a gymnastics teacher who wouldn't take me on as a three year old until I was cleared by a specialist because he thought I was tight.

Interestingly, I do remember as a child that when my parents asked what I wanted for my birthday, I'd tell them a more comfortable mattress. To their credit, they tried a couple times, but never found one that was to my liking and then just thought I was overly sensitive.