Abstract
Frontal lobe related disorders could be categorized as disturbance of executive-control system and of motivational salient system. The latter should be considered as social behavioral disturbance.1) Disinhibition,2) Apathy,3) Stimulus-bound stereotypical behavior and 4) Loss of awareness or reduced awareness about these impairments are regarded as motivational salience impairments. The author has considered the relationship between these disorders and motivational salience impairments.
