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Evaluations of dementia by EEG frequency analysis and psychological examination


Yoshimura, Hiroshi, Morimoto, Shigeto, Okuro, Masashi, Segami, Natsuki, Kato, Nobuo


The Journal Of Physiological Sciences: JPS, Volume: 60, No.: 5, Pages.: 383-388

Year of Publication



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.;

Bibtex Citation

@article{Yoshimura_2010, doi = {10.1007/s12576-010-0099-6}, url = {}, year = 2010, month = {jun}, publisher = {Springer Science $mathplus$ Business Media}, volume = {60}, number = {5}, pages = {383--388}, author = {Hiroshi Yoshimura and Shigeto Morimoto and Masashi Okuro and Natsuki Segami and Nobuo Kato}, title = {Evaluations of dementia by {EEG} frequency analysis and psychological examination}, journal = {The Journal of Physiological Sciences} }


aged, brain waves, cerebral cortex, dementia, diagnosis, electroencephalography, humans, methods, music, neuropsychological, neuropsychological tests, photic stimulation, physiopathology, severity of illness index, tests

Countries of Study


Types of Dementia

Dementia (general / unspecified)

Types of Study

Non randomised controlled trial

Type of Interventions

Diagnostic Target Identification

Diagnostic Targets