Can L'hermitte's sign be intermittent? Or if you have it, does it happen every time you bend your neck? And do you always feel it in the back or limbs? Or can it be mostly felt in the head?
For almost a year now, I've been experiencing a symptom that is somewhere between an electrical zap and a vibration. It's over very quickly - just a momentary jolt. I mostly feel it in my head, toward the back. Often it's just in the head. Occasionally I feel it in my chest, too. Almost like there's a string connecting the back of my head to the center of my chest, and it's just been plucked. At first I thought it was a cardiac/vascular thing, but I had a heart monitor, and it showed no abnormal cardiac activity when this was symptom occurs.
I have noticed that it tends to happen when my neck is bent, or when my whole body is bent over - and in fact it has happened several times in a barber's chair. But it doesn't happen every time I bend my neck. Far from it. I can't make it happen by moving in a particular way. And it also happens when my neck isn't bent, at random times. It's even happened when I'm lying in bed, flat on my back.
Could this be L'hermitte's, or does it have to be something else? Anyone else have L'hermitte's that behaves like this?