brain atrophy human 6 priority journal 6 adult 4 article 4 clinical article 4 controlled study 4 female 4 male 4 Acoustic Stimulation 2 Adult 2 Alzheimer disease 2 Alzheimer's disease 2 Analysis of Variance 2 Article 2 Attention 2 Avoidance Learning 2 Awareness 2 Blinking 2 Conditioning, Classical 2 Consciousness Disorders 2 Contingent Negative Variation 2 Electromyography 2 Evoked Potentials 2 Female 2 Humans 2 Male 2 Middle Aged 2 Pathological affective display 2 Prevalence 2