title: Evaluations of dementia by EEG frequency analysis and psychological examination.
abstract: In order to evaluate the stage of dementia, we focused attention on EEG rhythms and Hasegawa-dementia-rating scale (HDS-R). Frontal EEGs were recorded from dementia patients and normal controls during music and photo-image stimulations, and frequency analysis was performed. In the controls, profiles of rhythm pattern during music stimulation seemed to be markedly different from those during photo-image stimulation. In contrast, in dementia patients, it was difficult to find those differences. Interestingly, as HDS-R decreases, the variability of rhythm patterns also decreases. These results suggest that a decrease in cognitive function might be related to a decrease in the ability to generate various cortical rhythm patterns.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Kanazawa Medical University, Uchinada-cho, Ishikawa, 920-0293, Japan. hyoshimu@kanazawa-med.ac.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yoshimura
authors.forename: Shigeto
authors.initials: S
authors.lastname: Morimoto
authors.forename: Masashi
authors.initials: M
authors.lastname: Okuro
authors.forename: Natsuki
authors.initials: N
authors.lastname: Segami
authors.forename: Nobuo
authors.initials: N
authors.lastname: Kato
mesh_terms: D000368:Aged; D058256:Brain Waves; D002540:Cerebral Cortex / Q000503:physiopathology*; D003704:Dementia / Q000175:diagnosis* / Q000503:physiopathology*; D004569:Electroencephalography / Q000379:methods*; D006801:Humans; D009146:Music; D009483:Neuropsychological Tests; D010775:Photic Stimulation; D012720:Severity of Illness Index