Clinical Autonomic Research

, Volume 15, Issue 6, pp 368–372 | Cite as

Impaired circadian rhythm of gastric myoelectrical activity in patients with multiple system atrophy

  • Atsuya Suzuki
  • M. Asahina
  • C. Ishikawa
  • K. M. Asahina
  • K. Honma
  • T. Fukutake
  • T. Hattori


In order to evaluate gastric motility and its circadian rhythm in patients with multiple system atrophy (MSA) and healthy control subjects, we measured gastric myoelectrical activity (GMA) for 24 hours using a cutaneous electrogastrogram (EGG) recorder in 14 MSA patients and 9 age-matched controls.We analyzed six 10-minute segments of EGG before and after each meal and two 20-minute EGG segments during sleep; three parameters were used for the analysis: dominant frequency (DF), instability coefficient of dominant frequency (ICDF), and dominant power (DP). DF increased during daytime and decreased during sleep in the control, while this circadian variation was blunted in the patients with MSA. The average DF of the eight segments in the MSA patients did not differ from that of the control. Both MSA patients and control subjects did not show the circadian variation of ICDF and DP. The average ICDF of the eight segments in the patients with MSA was significantly decreased when compared with that of the control (p<0.01). No differences were observed in DP between the two groups. This study indicates that the healthy subjects appear to have a circadian rhythm of DF, and the patients with MSA appear to have impaired circadian rhythm of DF and decreased ICDF possibly due to the degeneration of the central autonomic neurons.

Key words

electrogastrography gastric myoelectrical activity multiple system atrophy circadian rhythm 


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Copyright information

© Steinkopff-Verlag 2005

Authors and Affiliations

  • Atsuya Suzuki
    • 1
  • M. Asahina
    • 1
  • C. Ishikawa
    • 1
  • K. M. Asahina
    • 1
  • K. Honma
    • 1
  • T. Fukutake
    • 1
  • T. Hattori
    • 1
  1. 1.Dept. of NeurologyChiba University Graduate School of MedicineChibaJapan

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