{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,1]],"date-time":"2025-11-01T18:46:30Z","timestamp":1762022790815,"version":"build-2065373602"},"reference-count":41,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2020,7,4]],"date-time":"2020-07-04T00:00:00Z","timestamp":1593820800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Oral Rehabilitation"],"published-print":{"date-parts":[[2020,8]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Some authors state that above\u2010normal surface electromyography (SEMG) levels during mandibular rest (MR) are a general sign of\u00a0temporomandibular disorders (TMD).<\/jats:p><\/jats:sec><jats:sec><jats:title>Objective<\/jats:title><jats:p>The\u00a0<jats:italic>aim<\/jats:italic> was to compare\u00a0SEMG levels in the masseter and anterior temporalis areas during MR between patients with disc displacement (DD) and subjects identified as healthy.\u00a0The<jats:italic>\u00a0hypothesis\u00a0<\/jats:italic>was\u00a0that\u00a0average SEMG levels would be higher in the patients during MR before and after repeated clenches with maximal effort.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Thirty\u2010six healthy subjects, and 42 patients with DD, were included. SEMG levels were recorded bilaterally in the temporalis and masseter areas during MR before clenching and after repeated clenches with maximal effort. Multivariate analysis of variance (MANOVA) was used to compare the means of the log\u2010transformed SEMG\u2010values for the subject groups.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The mean MR levels in the four areas before clenching ranged from \u22120.19 log (\u00b5V) to 1.20 log(\u00b5V) in healthy subjects and from \u22120.22 log(\u00b5V) to 0.96 log(\u00b5V) in patients. The mean MR levels in the four areas after repeated clenches ranged from \u22120.19 log (\u00b5V) to 1.04 log(\u00b5V) in healthy subjects and from \u22120.27 log(\u00b5V) to 0.93 log(\u00b5V) in patients. The MANOVA test showed no significant differences in the means for MR for the four areas between the groups at the 5% significance level.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The hypothesis that jaw muscle SEMG levels during MR are on average generally higher in TMD patients is not supported. A possible explanation for the previous findings is that activity in other muscles was mislabelled as jaw muscle activity.<\/jats:p><\/jats:sec>","DOI":"10.1111\/joor.13032","type":"journal-article","created":{"date-parts":[[2020,6,9]],"date-time":"2020-06-09T07:27:31Z","timestamp":1591687651000},"page":"930-938","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Is SEMG recorded \u201chyperactivity\u201d during mandibular rest a sign of dysfunctional jaw muscle activity and temporomandibular disorders (TMD)?"],"prefix":"10.1111","volume":"47","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3160-1007","authenticated-orcid":false,"given":"Jianlai","family":"Hu","sequence":"first","affiliation":[{"name":"Department of Prosthodontics The Second Affiliated Hospital Zhejiang University School of Medicine Hangzhou China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yan","family":"Dong","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics The Second Affiliated Hospital Zhejiang University School of Medicine Hangzhou China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sven E.","family":"Widmalm","sequence":"additional","affiliation":[{"name":"Department of BMS Division of Prosthodontics School of Dentistry University of Michigan Ann Arbor MI USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anders","family":"Buvarp","sequence":"additional","affiliation":[{"name":"Monument CO USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tongsheng","family":"Zhang","sequence":"additional","affiliation":[{"name":"Neurosurgery Department University of New Mexico Las Cruces NM USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1107-7655","authenticated-orcid":false,"given":"Boxiu","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics The Second Affiliated Hospital Zhejiang University School of Medicine Hangzhou China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Min","family":"Lin","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics The Second Affiliated Hospital Zhejiang University School of Medicine Hangzhou China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dong","family":"Zhou","sequence":"additional","affiliation":[{"name":"Zhejiang University of Technology Hangzhou China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2020,7,4]]},"reference":[{"volume-title":"Boucher\u2019s Clinical Dental Terminology","year":"1993","author":"Zwemer TJ","key":"e_1_2_10_2_1"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/0022-3913(69)90269-8"},{"key":"e_1_2_10_4_1","first-page":"245","volume-title":"Muscles Alive","author":"Basmajian JV","year":"1985"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2842.1983.tb00096.x"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/0003-9969(84)90176-6"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2842.1985.tb00616.x"},{"key":"e_1_2_10_8_1","first-page":"1748","volume-title":"Stedman\u2019s medical dictionary","author":"Stedman JK","year":"2006"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/joor.12132"},{"volume-title":"Neuromuscular dental diagnosis and treatment","year":"2005","author":"Jankelson RR","key":"e_1_2_10_10_1"},{"key":"e_1_2_10_11_1","unstructured":"http:\/\/iccmo.org\/tmj-tmd-diagnosis\/"},{"key":"e_1_2_10_12_1","doi-asserted-by":"publisher","DOI":"10.1179\/crn.2011.034"},{"key":"e_1_2_10_13_1","first-page":"530","article-title":"Reducing chronic masseter and temporalis muscular hyperactivity with computer\u2010guided occlusal adjustments","volume":"31","author":"Kerstein RB","year":"2010","journal-title":"Compend Contin Educ Dent"},{"key":"e_1_2_10_14_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2842.1982.tb01031.x"},{"key":"e_1_2_10_15_1","first-page":"60","article-title":"Pain, tenderness and strength of human mandibular elevators","volume":"88","author":"Sheikholeslam A","year":"1980","journal-title":"Scand J Dent Res"},{"volume-title":"Biomedical instrumentation systems","author":"Chatterjee S","key":"e_1_2_10_16_1"},{"volume-title":"Biomedical Signal Analysis","year":"2002","author":"Rangayyan RM","key":"e_1_2_10_17_1"},{"key":"e_1_2_10_18_1","first-page":"125","article-title":"An evaluation of the use of surface electromyography in the diagnosis, documentation, and treatment of dental patients","volume":"3","author":"Lund JP","year":"1989","journal-title":"J Craniomandib Disord Facial Oral Pain"},{"key":"e_1_2_10_19_1","unstructured":"Royal College of Dental Surgeons of Ontario.Guidelines. 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