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Reversed or chaotic diurnal sleep rhythms
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Many patients with [[ME/CFS]] end up with circadian abnormalities ranging from severe delayed sleep phase to non 24 hour circadian rhythm disorder to apparent loss of regular circadian rhythms. [[File:Crsd iswr en 100.svg|400px|thumb|right|Circadian Rhythm Sleep Disorders, irregular sleep-wake type, [[ICD-10-CM|G47.23]], Sleep and Wake Time one week in a person without ME/CFS]] == Canadian Consensus Criteria == The [[Canadian Consensus Criteria]] (CCC) for ME/CFS states that some form of [[sleep dysfunction]] will be present in almost all ME/CFS patients, and includes sleep dysfunction not caused by [[sleep apnea]] as a diagnostic criteria.<ref name="canadianconsensus-CCC">{{Citation | last1 = Carruthers | first1 = Bruce M. | authorlink1 = Bruce Carruthers | last2 = Jain | first2 = Anil Kumar | authorlink2 = Anil Kumar Jain | last3 = De Meirleir | first3 = Kenny L. | authorlink3 = Kenny De Meirleir | last4 = Peterson | first4 = Daniel L. | authorlink4 = Daniel Peterson | last5 = Klimas | first5 = Nancy G. | authorlink5 = Nancy Klimas | last6 = Lerner | first6 = A. Martin | authorlink6 = Martin Lerner | last7 = Bested | first7 = Alison C. | authorlink7 = Alison Bested | last8 = Flor-Henry | first8 = Pierre | authorlink8 = Pierre Flor-Henry | last9 =Joshi | first9 = Pradip| authorlink9 = Pradip Joshi | last10 = Powles | first10 = AC Peter | authorlink10 = A C Peter Powles | last11 = Sherkey | first11 = Jeffrey A. | authorlink11 = Jeffrey Sherkey | last12 = van de Sande | first12 = Marjorie I. | authorlink12 = Marjorie van de Sande | title = Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: Clinical Working Case Definition, Diagnostic and Treatment Protocols| journal = Journal of Chronic Fatigue Syndrome | volume = 11 | issue = 2 | pages = 7-115 | date = 2003 | pmid = | doi = 10.1300/J092v11n01_02| url = http://www.investinme.org/Documents/PDFdocuments/CanadianDefinitionME-CFS.pdf}}</ref> "Reversed or chaotic diurnal sleep rhythms" are examples of [[sleep dysfunction]] involving circadian rhythm disruption, and are listed as a possible manifestation of sleep dysfunction in the Canadian Consensus Criteria for ME/CFS.<ref name="canadianconsensus-CCC"/> At least one form of sleep dysfunction is required for diagnosis according to the [[Canadian Consensus Criteria]]. [[Category:Sleep signs and symptoms]] == See also == * [[Sleep dysfunction]] == Learn more == == References ==
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