ABSTRACT
This chapter describes a model of frontal lobe organization based on the idea that the symptoms of a frontal lobe lesion can be understood as disruptions in the microgenetic unfolding of an action. According to the microgenetic account, every behavior or mental state has a submerged infrastructure distributed over evolutionary planes in the forebrain. Cognitive processing retraces the direction of phyletic growth, so that evolutionary levels, and correlated processing stages, are entrained in behavior in the order of their evolutionary appearance. In a very real sense, microgeny recapitulates phylogeny as cognition rapidly unfolds over evolutionary structure.
