Circadian rhythm abnormalities of wrist activity of institutionalized dependent elderly persons with dementia

Y. Motohashi, A. Maeda, H. Wakamatsu, S. Higuchi, T. Yuasa

研究成果: Contribution to journalArticle査読

20 被引用数 (Scopus)

抄録

Background. The study objective was to clarify the descriptive characteristics of circadian rhythm abnormalities of wrist activity of the institutionalized elderly with dementia. Methods. We studied 82 elderly persons with dementia who were institutionalized in a long-term medical care facility. The ambulatory continuous monitoring of their wrist activity was conducted for 7 days at 1-minute intervals. The time series data were analyzed using the double-plotted chronogram, spectral analysis was performed using the fast Fourier transformation and periodogram analysis was performed as well. Results. The frequency of circadian rhythm abnormalities of wrist activity rhythm in elderly persons with dementia was 57.3% (47 out of 82). The abnormalities were classified into four categories: Severely impaired circadian rhythm type with no boundary between day and night, free-running rhythm type, decreased circadian amplitude type, and accentuation of ultradian rhythm type. Conclusion. This four-category classification system provides a scientific approach for studying the mechanisms of circadian activity rhythm abnormalities of elderly persons with dementia.

本文言語英語
ページ(範囲)M740-M743
ジャーナルJournals of Gerontology - Series A Biological Sciences and Medical Sciences
55
12
DOI
出版ステータス出版済み - 2000
外部発表はい

All Science Journal Classification (ASJC) codes

  • 加齢科学
  • 老年医学

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