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Our group recently reported, in a controlled experimental study, that sleep fragmentation among healthy adults resulted in subsequent decrements in endogenous pain inhibition. The present report follows up that observation by extending this line of research to a sample of patients experiencing persistent pain. Patients with chronic temporomandibular joint disorder (TMD) pain were studied using polysomnography and psychophysical evaluation of pain responses. We assessed whether individual differences in sleep continuity and\/or architecture were related to diffuse noxious inhibitory controls (DNIC), a measure of central nervous system pain inhibition. Among 53 TMD patients, higher sleep efficiency and longer total sleep time were positively associated with better functioning of DNIC (<jats:italic>r<\/jats:italic> = 0.42\u20130.44, <jats:italic>p<\/jats:italic> &lt; 0.01; <jats:italic>p<\/jats:italic>s &lt; 0.05 for the multivariate analyses). These results suggest the possibility that disrupted sleep may serve as a risk factor for inadequate pain\u2010inhibitory processing and hint that aggressive efforts to treat sleep disturbance early in the course of a pain condition might be beneficial in reducing the severity or impact of clinical pain.<\/jats:p>","DOI":"10.1016\/j.ejpain.2008.12.007","type":"journal-article","created":{"date-parts":[[2009,1,27]],"date-time":"2009-01-27T05:20:19Z","timestamp":1233033619000},"page":"1043-1047","source":"Crossref","is-referenced-by-count":140,"title":["Sleep continuity and architecture: Associations with pain\u2010inhibitory processes in patients with temporomandibular joint disorder"],"prefix":"10.1002","volume":"13","author":[{"given":"R.R.","family":"Edwards","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"E.","family":"Grace","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.","family":"Peterson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B.","family":"Klick","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.A.","family":"Haythornthwaite","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.T.","family":"Smith","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2012,1,13]]},"reference":[{"key":"e_1_2_5_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0304-3959(96)03226-5"},{"key":"e_1_2_5_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0010-440X(99)90008-1"},{"key":"e_1_2_5_4_1","unstructured":"American Academy of Sleep Medicine The international classification of sleep disorders: diagnostic and coding manual. 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