Maybe it has more to do with control -- I always believed I just 'chose' to access a part of the body's control system not normally controlled but involuntarily directed.
Since being left-handed has typically involved 'choosing' to go against the grain, since most children are told to 'pick up a pencil' with their right hand, maybe it is a correlation, but not a causation?View Thread
Accelerate and reduce heart-rate, as well as dilate and reduce dilation of pupils.
I didn't even realize the second was unusual until now.
It started as a kid in school -- I was always challenging the impossible -- in 5th grade we were studying involuntary actions, and we were asked to stare as long as possible without blinking.
To achieve this, I adjusted my focus, and thus my dilation, back and forth for 15 minutes, until every student in class was staring at me. I would have gone on indefinitely but one rude student blew air into my eyes!
Then in 9th grade, we were doing a physical exercise experiment involving resting and active heart-rate. I accelerated my heart rate during rest, and reduced it after exercise, and was thrown out of the data pool because my data was an outlier -- higher resting rate and lower exercise rate!
Since then I've played with this ability, but more recently I've been concerned that it might be an indicator of a medical weakness -- having control of something most people leave to their body to regulate seems like a double-edged sword!