Hi everyone. From an early age I realized I could consciously initiate some "sensation" in my lower back. Later on, I found that there was a large increase in heart rate (~70 -> ~180) while doing this and so I assumed it was in some way related to adrenaline. I have also noticed dilated pupils and diminished pain. This is not related to any breathing techniques or anything like that, it's something I have direct control of as I have control over my fingers.
I have found a handful of people over the internet who claim to be able to do this as well but I haven't been able to find any medical record of it. Has anyone heard of this or knows about any research in the area?
Thanks.