ApathyDepressionDepressive DisorderDepression, PostpartumPsychiatric Status Rating ScalesDepressive Disorder, MajorCortical Spreading DepressionBehavioral SymptomsAntidepressive AgentsLong-Term Synaptic DepressionNeuropsychological TestsPiribedilAffectParkinson DiseaseAnxietyAffective SymptomsMood DisordersQuestionnairesDementiaCognition DisordersPsychometricsPaired-Associate LearningSeverity of Illness IndexMental Status ScheduleMotivationComorbidityKetosis