Michelle
Senior Member (Voting Rights)
My point when picking this one out (way back in the thread as I am starting from the beginning) is that if we’re wanting people to help us to avoid excessive noise, light …sensory stimulus, then we would hope to get them to understand that it’s not that I am more prone to complaining of the pain of a paper cut, but rather that I have already been debrided or severely burnt and the paper is cutting a lot deeper than my outer skin.
Excellent way of putting it.
I, too, use "difficulty processing sensory stimuli" rather than "sensory hypersensitivity" for all the reasons previously stated. I also often point out that dodgy governments--particularly my own--use sensory overload/deprivation and orthostatic stressors in "enhanced interrogations." Even very healthy twenty-year-old men will find being bombarded with very loud music and bright, flashing lights (as well as being chained to the floor in such a way that they cannot sit down) utterly intolerable after a certain amount of time. For pwME/CFS, the threshold at which that sensory stimuli becomes torture is much much lower. Your analogy @Subtropical Island of already having significant tissue damage before getting a paper cut works in much the same way.
So the key question, which I had raised in relation to whether PEM was the best thing to focus on, is whether the relation to exertion is truly the most reliable or the most useful temporal feature when it comes to diagnosing and, ultimately, understanding ME/CFS.
I've found myself in the last few years increasingly uncomfortable with the causal insistence on exertion and crashing. It's always retrospective and, thus, prone to all sorts of biases. Most of the time when I crash, I'm going back and doing what @hibiscuswahine mentions above, "what did I do wrong?" And then coming up with "well, maybe that thing I did a couple of days ago?" Which I think we can all see why that's a problem scientifically.
Moreover, the worst crash I've ever had had no link to exertion. My best causal guess would be hormonal changes brought on by perimenopause but without the ability to measure anything, "whereof one cannot speak, thereof one must remain silent."
To be very clear: I am NOT saying exertion is irrelevant or unimportant. Like @Jonathan Edwards (if I've understood him correctly), I think that exertion is one of many potential triggers or "gear-shifts" precipitating a crash, perhaps increasing the perturbation of a complex cycle of signals and processes already at work under the hood that is completely random. Because exertion is a potential trigger--and because we have no good evidence that it helps--GET should be contraindicated. But like Jo, I don't think the insistence on centering exertion as the cause of a crash helps us and may well be distracting us.
[That last par hurt my brain. Must rest. Sorry if I can't respond further.]