Alzheimer disease 117 human 102 Article 78 Humans 77 Alzheimer's disease 75 Alzheimer Disease 65 male 63 female 60 controlled study 58 aged 52 Aged 38 cognitive defect 37 Female 34 nuclear magnetic resonance imaging 34 adult 33 Male 32 major clinical study 32 cognition 29 diagnostic imaging 28 very elderly 24 Aged, 80 and over 23 dementia 23 middle aged 23 mild cognitive impairment 23 neuroimaging 23 Cognitive Dysfunction 22 Magnetic Resonance Imaging 21 cohort analysis 21 amyloid beta protein 20 nonhuman 20