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ME/CFS AUSTRALIA (SA) INC
Registered Charity 698
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CFS distinguished from CFS and Fibromyalgia by unique sleep stage pattern
Tuesday 29 November 2011
CFS distinguished from CFS + FM by unique sleep stage pattern
Article
Sleep-Stage Dynamics in Patients with Chronic Fatigue Syndrome with or without Fibromyalgia
– Source: Sleep, Nov 2011
By A Kishi, BH Natelson, et al.
Abstract
Study Objectives: Chronic fatigue syndrome (CFS) and fibromyalgia (FM) are medically unexplained conditions that often have overlapping symptoms, including sleep-related complaints.
However, differences between the 2 conditions have been reported, and we hypothesized that dynamic aspects of sleep would be different in the 2 groups of patients.
Participants: Subjects were:
• 26 healthy control subjects,
• 14 patients with CFS but without FM (CFS alone),
• And 12 patients with CFS and FM (CFS+FM) - all women.
Measurements and Results: We studied transition probabilities and rates between sleep stages (waking, rapid eye movement [REM] sleep, stage 1 [S1], stage 2 [S2], and slow-wave sleep [SWS]) and duration distributions of each sleep stage.
We found that:
• The probability of transition from REM sleep to waking was significantly greater in subjects with CFS alone than in control subjects, which may be the specific sleep problem for people with CFS alone.
• Probabilities of (a) transitions from waking, REM sleep, and S1 to S2, and (b) those from SWS to waking and S1 were significantly greater in subjects with CFS+FM than in control subjects;
• In addition, rates of these transitions were also significantly increased in subjects with CFS+FM.
• Result (a) might indicate increased sleep pressure in subjects with CFS+FM, whereas result (b) may be the specific sleep problem of subjects with CFS+FM.
• We also found that shorter durations of S2 sleep are specific to patients with CFS+FM, not to CFS alone.
Conclusion: These results suggest that CFS and FM may be different illnesses associated with different problems of sleep regulation.
Source: Sleep (www.journalsleep.org), Nov 2011;34(11):1551-60. PMID:22043126, by Kishi A, Natelson BH, Togo F, Struzik ZR, Rapoport DM, Yamamoto Y. Educational Physiology Laboratory, Graduate School of Education, The University of Tokyo; Japan Society for the Promotion of Science, Tokyo, Japan; Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, NYU School of Medicine, New York, NY; Pain & Fatigue Study Center, Beth Israel Medical Center and Albert Einstein College of Medicine, New York, NY; Department of Work Stress Control, National Institute of Occupational Safety and Health, Kawasaki, Japan
The above, with comments, originally appeared here.
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