Physiological units and behavioral elements: Dynamic brains relate to dynamic behavior

Nunez is to be applauded for putting forward a theoretical brain model. In order to improve any model it needs to be experimentally testable. The mode l presented in the target article suffers from insufficient clarity as to h ow new experimental designs could be derived. This is a consequence of negl ecting the purpose of the brain, which is to produce effective and adaptive behavior. It might be possible to overcome this drawback by including Hebb -based modeling.