{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,26]],"date-time":"2026-07-26T03:56:34Z","timestamp":1785038194985,"version":"3.55.0"},"reference-count":57,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2013,11,15]],"date-time":"2013-11-15T00:00:00Z","timestamp":1384473600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"crossref","award":["R01 DE918569"],"award-info":[{"award-number":["R01 DE918569"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J of Oral Rehabilitation"],"published-print":{"date-parts":[[2013,12]]},"abstract":"<jats:title>Summary<\/jats:title><jats:p>Despite theoretical speculation and strong clinical belief, recent research using laboratory polysomnographic (<jats:styled-content style=\"fixed-case\">PSG<\/jats:styled-content>) recording has provided new evidence that frequency of sleep bruxism (<jats:styled-content style=\"fixed-case\">SB<\/jats:styled-content>) masseter muscle events, including grinding or clenching of the teeth during sleep, is not increased for women with chronic myofascial temporomandibular disorder (<jats:styled-content style=\"fixed-case\">TMD<\/jats:styled-content>). The current case\u2013control study compares a large sample of women suffering from chronic myofascial <jats:styled-content style=\"fixed-case\">TMD<\/jats:styled-content> (<jats:italic>n<\/jats:italic>\u00a0=\u00a0124) with a demographically matched control group without <jats:styled-content style=\"fixed-case\">TMD<\/jats:styled-content> (<jats:italic>n<\/jats:italic>\u00a0=\u00a046) on sleep background electromyography (<jats:styled-content style=\"fixed-case\">EMG<\/jats:styled-content>) during a laboratory <jats:styled-content style=\"fixed-case\">PSG<\/jats:styled-content> study. Background <jats:styled-content style=\"fixed-case\">EMG<\/jats:styled-content> activity was measured as <jats:styled-content style=\"fixed-case\">EMG<\/jats:styled-content> root mean square (<jats:styled-content style=\"fixed-case\">RMS<\/jats:styled-content>) from the right masseter muscle after lights out. Sleep background <jats:styled-content style=\"fixed-case\">EMG<\/jats:styled-content> activity was defined as <jats:styled-content style=\"fixed-case\">EMG RMS<\/jats:styled-content> remaining after activity attributable to <jats:styled-content style=\"fixed-case\">SB<\/jats:styled-content>, other orofacial activity, other oromotor activity and movement artefacts were removed. Results indicated that median background <jats:styled-content style=\"fixed-case\">EMG<\/jats:styled-content> during these non\u2010<jats:styled-content style=\"fixed-case\">SB<\/jats:styled-content> event periods was significantly higher (<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00\u00b701) for women with myofascial <jats:styled-content style=\"fixed-case\">TMD<\/jats:styled-content> (median\u00a0=\u00a03\u00b731\u00a0\u03bcV and mean\u00a0=\u00a04\u00b798\u00a0\u03bcV) than for control women (median\u00a0=\u00a02\u00b783\u00a0\u03bcV and mean\u00a0=\u00a03\u00b788\u00a0\u03bcV) with median activity in 72% of cases exceeding control activity. Moreover, for <jats:styled-content style=\"fixed-case\">TMD<\/jats:styled-content> cases, background <jats:styled-content style=\"fixed-case\">EMG<\/jats:styled-content> was positively associated and <jats:styled-content style=\"fixed-case\">SB<\/jats:styled-content> event\u2010related <jats:styled-content style=\"fixed-case\">EMG<\/jats:styled-content> was negatively associated with pain intensity ratings (0\u201310 numerical scale) on post\u2010sleep waking. These data provide the foundation for a new focus on small, but persistent, elevations in sleep <jats:styled-content style=\"fixed-case\">EMG<\/jats:styled-content> activity over the course of the night as a mechanism of pain induction or maintenance.<\/jats:p>","DOI":"10.1111\/joor.12112","type":"journal-article","created":{"date-parts":[[2013,11,15]],"date-time":"2013-11-15T09:33:58Z","timestamp":1384508038000},"page":"883-891","source":"Crossref","is-referenced-by-count":83,"title":["Masticatory muscle sleep background electromyographic activity is elevated in myofascial temporomandibular disorder patients"],"prefix":"10.1111","volume":"40","author":[{"given":"K. G.","family":"Raphael","sequence":"first","affiliation":[{"name":"Department of Oral &amp; Maxillofacial Pathology, Radiology &amp; Medicine New York University College of Dentistry New York NY USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M. N.","family":"Janal","sequence":"additional","affiliation":[{"name":"Department of Epidemiology and Health Promotion New York University College of Dentistry New York NY USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"D. A.","family":"Sirois","sequence":"additional","affiliation":[{"name":"Department of Oral &amp; Maxillofacial Pathology, Radiology &amp; Medicine New York University College of Dentistry New York NY USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B.","family":"Dubrovsky","sequence":"additional","affiliation":[{"name":"Center for Sleep Disorders Medicine and Research New York Methodist Hospital Brooklyn NY USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P. E.","family":"Wigren","sequence":"additional","affiliation":[{"name":"Private practice Stockholm Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. J.","family":"Klausner","sequence":"additional","affiliation":[{"name":"Department of Oral &amp; Maxillofacial Pathology, Radiology &amp; Medicine New York University College of Dentistry New York NY USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A. C.","family":"Krieger","sequence":"additional","affiliation":[{"name":"Departments of Medicine, Neurology and Neuroscience, and Genetic Medicine Weill Cornell Medical College Cornell University New York NY USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"G. 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