title: [Electroencephalographic examination of the cerebral activity of elderly people living in a nursing home after postural change from supine to sitting positions].
abstract: OBJECTIVE
  We investigated the cerebral activity of elderly persons living in a nursing home in the sitting position by analyzing the electroencephalography findings of postural changes in the supine and sitting positions.
  
  
  METHODS
  This study was approved by the Health Ethics Committee of Osaka University. The subjects were 17 elderly people (4 men and 13 women, average age 85.35 ± 8.26 years) living in a nursing home. Electroencephalograms were obtained in 8 cerebral regions (the left front-polar (Fp(1)); right front-polar (Fp(2)); left frontal (F(3)); right frontal (F(4)); left central (C(3)); right central (C(4)); left occipital (O(1)) and right occipital (O(2))) while subjects sat in a head-up position in bed, or in a chair or wheelchair. Measurement was obtained over 5-minute supine, 15-minute sitting, and 5-minute conversation periods. We performed the fast Fourier transform on measured electroencephalograms to calculate the average power values of alpha band components (8-13 Hz) and beta band components (13-30 Hz) for each cerebral section.
  
  
  RESULTS
  Compared with the supine position, the sitting position in bed did not show a significant increase in power values, whereas the sitting position in a chair showed significant increases in power values in all regions. Most of the time, the findings of patients sitting position in a chair showed significantly higher power values than those of patients sitting in bed in all regions.
  
  
  CONCLUSIONS
  During the 20 minutes after postural change from the supine to sitting positions, the cerebral activity of subjects sitting in a chair was higher than that of subjects sitting in bed.
authors: School of Nursing Science, Meiji University of Integrative Medicine.
authors: Atsuko
authors: A
authors: Tokushige
authors: Yoko
authors: Y
authors: Aso
authors: Aki
authors: A
authors: Ibe
authors: Megumi
authors: M
authors: Katayama
authors: Shizuka
authors: S
authors: Kimura
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008297:Male; D009735:Nursing Homes; D011187:Posture; D016683:Supine Position