| Context information is task-relevant information that people can use to prepare for upcoming events (stimuli, actions, tasks) so that adequate task performance is facilitated. Interactions of prefrontal cortex (PFC) and the dopamine (DA) neurotransmitter system subserve the representation, maintenance, and updating of context information. We attempt to 1) advance our understanding of the neurocognitive architecture underlying context processing (using behavioral, brain-potential, and neuro-imaging techniques), and 2) to study context processing in populations with deficiencies in PFC and in the DA system (normal aging and Parkinson's disease). |