When I feel afraid, my body turns on. From elevated blood pressure to sweaty palms, my body shows that I’m feeling afraid. When I sense those body signals, I get sensational feedback to my mind confirming that my body “got the message.”
Some fears appear as an intense and irrational reaction to sensory input. Spiders, for example, invoke in many an intense fear that modifies their perception of the spider’s relative size.
Why is that?
I think it may have to do with a positive feedback loop. Positive feedback is defined as “the enhancement or amplification of an effect by its own influence on the process that gives rise to it.” (Wikipedia)