title: Apathy and agitation: challenges and future directions.
authors.forename: Constantine
authors.initials: C
authors.lastname: Lyketsos
mesh_terms: D000339:Affect; D000368:Aged; D000544:Alzheimer Disease / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology; D003937:Diagnosis, Differential; D006801:Humans; D011595:Psychomotor Agitation / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology*