Really fascinating stuff. I immediately wonder if there is any explanation for this reversed flow of signals that might tie it into an evolutionary theory of depression e.g. the social withdrawal hypothesis - is the brain using less energy doing things this way?
Interesting thought. My mind went to the possibility that since they reversed signals are allowing your mood to determine how you feel physically that it might allow you to leverage a good mood to overcome negative signals from your body i.e. power through pain or exhaustion. Maybe it became maladaptive when more opportunity for rumination became available.
