Thanks. I have managed to change the font size. Sorry 'bout that, Mark!
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Thanks, clarabelle. Yes, what you describe is very similar to what I experience; though I've never experienced it while lying down; always sitting, driving(!), or standing.
Thanks, Mark - It doesn't feel at all like muscle spasms or ligaments; much, much more interior and 'electrical' in sensation is all I can think of
["Brain spasm" is more like it. lol. Oh, here comes to mind all the bad jokes about "PCS spaz"!]