I’ve noticed something while experiencing ASMR.
I sometimes, on a bad hair day, wear a hat. I have long hair, not unlike the typical look rocked by many heavy metal band members, some of which I listen to from time to time.
While I was experiencing a hit the one day, I saw that the peak of my cap actually started to lift up and down, more or less in tune with the “tidal pulses” I usually experience during the event.
This led me to think that this sensation not only has internal effects, like the customary tingles and pulses, or ripples, but also external, physical effects too. And it makes sense seeing as the scalp, outside the head and body, actually seems to expand and contract, or move backwards and forwards (at least with me it does anyway), during the sensation’s duration.
Hey, that last bit rhymed.
When it starts to subside, then my cap just came down and stayed still.
This also ties in with people claiming to get gooseflesh on the arms and l at times when experiencing ASMR. This would be another external effect that some have.