ApathyFatigueMuscle FatigueFatigue Syndrome, ChronicMental FatigueBehavioral SymptomsDepressionPiribedilParkinson DiseaseNeuropsychological TestsTreatment OutcomePsychiatric Status Rating ScalesSeverity of Illness IndexAffective SymptomsQuestionnairesQuality of LifeTime FactorsDementiaAffectChronic DiseaseMood DisordersPainActivities of Daily LivingDepressive DisorderCognition DisordersProspective StudiesInfratentorial NeoplasmsPsychometrics