Inclusion Criteria:  Blood thinners Hormones Antihypertensives Cholesterol reducers Normal or corrected-to-normal vision and hearing Fulfill standard inclusion criteria for MRI measurements Sufficient language skills  Exclusion Criteria:  Dementia Parkinsonism Stroke Cardiovascular diseases Bleeding tendency Oncological diseases Schizophrenia Obsessive-compulsive disorder Anxiety disorders Severe depression Head injuries Head surgery Head implants Eye diseases (cataract, glaucoma, blindness) Accidents that limit physical fitness and mobility Psychotropic drugs Neuroleptics