display a behavioral pattern indicative of potential
relevance for symptoms of schizophrenia (Rojas and Joodmardi, 2007).
Cognitive symptoms in PD cause significant burden to the patient,
care-givers and society (Schrag and Morley, 2004; Schrag and Hovris,
2006). Currently there are few practical methods to investigate
cognitive features of PD,which precludes important preclinical studies
that could potentially elucidatemechanisms and identify therapeutics.