This paper presents an AI model of integrated planning and reaction based on neuropsychological theories of similar human behavior. The model forges a link between frontal lobe models and AI planning systems that can improve our understanding of situated planning through a combined perspective. This paper first sets the frontal lobes in context, and then summ-rizes the frontal lobe theories upon which the model is based. Those theories axe then synthesized into a single computational mode/for an axtiticial frontal lobe, and the components axe discussed from both neuropsychological and AI perspectives. The paper concludes with a discussion of evaluation issues.