Depression, Apathy, Anhedonia, Fatigue in Parkinson's Disease -- Mild Cognitive Impairment in Parkinson's Disease -- Parkinson's Disease Dementia -- Impulse Control Disorders -- Influence of Dietary Constituents on Motor and Non-Motor Symptoms in Parkinson's Disease -- Psychosis in Parkinson's Disease -- Neuropsychiatric Manifestations in Atypical Parkinsonian Syndromes -- Neuropsychiatric Disturbances in Dystonia -- Depression in Huntington's Disease -- Cognitive Impairment and Dementia (Mild or Major Neurocognitive Disorder) in Huntington's Disease -- Tics -- Wilson's Disease -- Ataxia.