Characteristic time scales of electroencephalograms of narcoleptic patients and healthy controls

  • Authors:

  • Jong Won Kim;Hongbeom Shin;Eui-Joong Kim;Young-Jin Koo;Byunghun Choi;Kwang Suk Park;Do-Un Jeong

  • Affiliations:

  • School of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia and Brain Dynamics Centre, Westmead Millennium Institute, Sydney Medical School - Western, The University of Sy ...;Komoki Sleep Center, Seoul 135-090, Republic of Korea;Department of Neuropsychiatry and Division of Sleep Study, Eulji General Hospital, Seoul 139-711, Republic of Korea;Department of Psychiatry, Eulji University School of Medicine, Daejeon 301-746, Republic of Korea;Interdisciplinary Program, Seoul National University Graduate School, Seoul 110-744, Republic of Korea;Department of Biomedical Engineering, Seoul National University College of Medicine, Seoul 110-744, Republic of Korea;Department of Psychiatry, Center for Sleep and Chronobiology, and Clinical Research Institute, Seoul National University College of Medicine and Hospital, Seoul 110-744, Republic of Korea

  • Venue:
  • Computers in Biology and Medicine
  • Year:
  • 2010

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Abstract

Sleep electroencephalograms (EEGs) typically showed correlated fluctuations that became random-like oscillations beyond a characteristic time scale. To investigate this behavior quantitatively, the detrended fluctuation analysis (DFA) was applied to EEGs of 10 narcoleptic patients (22.0+/-4.0yrs; 6 males) and 8 healthy controls (24.0+/-2.0yrs; 5 males). The characteristic time scales of the narcoleptics and controls were estimated as 1.8+/-0.7 and 4.4+/-1.2s, respectively (significance level, p