oops - that link should be a still shot of both ANS and HKS in the Wasabi Tuna movie -
You have to remember that the brain "repeats and repeats and repeats". It learns and creates habits. It's how we function. If we had to get up and think HOW to brush our teeth every morning, we'd be in the "learning stage" and applying that to everything we do, we'd be overwrought.