Target of brain activity: its own critical point.

The brain regulates not only the body and its internal environment and motor activity, but it also regulates the activity of its own very self. What is the set-point or target of the brain's regulation of its own activity? A proposal is that the kind of state known to physics by the name "critical" may give a valuable model of the set-point of the brain's self-regulation. The idea of dynamical scaling then corresponds with John Hughlings Jackson's doctrine of levels. The idea of marginal phase junctions corresponds with the stable lability of the will.