{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,25]],"date-time":"2026-07-25T11:06:00Z","timestamp":1784977560596,"version":"3.55.0"},"reference-count":30,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2017,6,22]],"date-time":"2017-06-22T00:00:00Z","timestamp":1498089600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["81470762"],"award-info":[{"award-number":["81470762"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J of Oral Rehabilitation"],"published-print":{"date-parts":[[2017,8]]},"abstract":"<jats:title>Summary<\/jats:title><jats:p>Mandibular functions are associated with electromyographic activity of the jaw muscles and also the sternocleidomastoid muscle (<jats:styled-content style=\"fixed-case\">SCM<\/jats:styled-content>). The precise spatiotemporal relation of <jats:styled-content style=\"fixed-case\">SCM<\/jats:styled-content> and masticatory muscles activities during chewing is worthy of investigation. To analyse the sequential recruitment of <jats:styled-content style=\"fixed-case\">SCM<\/jats:styled-content> and masseter activities during chewing as indicated by the spatiotemporal locations of their activity peaks. Jaw movements and bilateral surface electromyographic activity of <jats:styled-content style=\"fixed-case\">SCM<\/jats:styled-content> and masseter were recorded during gum chewing in 20 healthy subjects. The timing order was decided by comparing the length of time from the time when the opening started to the time when the surface electromyographic activity reached its peak value. Spatial order was analysed by locating the peak electromyographic activity onto a standard chewing cycle which was created based on 15 unilateral chewing cycles. Paired <jats:italic>t<\/jats:italic>\u2010test, one\u2010way <jats:styled-content style=\"fixed-case\">ANOVA<\/jats:styled-content> and Student\u2013Newman\u2013Keuls post\u2010test were used for comparisons. Although the Time to Peak for the balancing side <jats:styled-content style=\"fixed-case\">SCM<\/jats:styled-content> appeared shorter than for the other three tested muscles, most often it did not reach a level of significance. However, the location of the balancing side <jats:styled-content style=\"fixed-case\">SCM<\/jats:styled-content>'s peak activity was further from the terminal chewing position (<jats:styled-content style=\"fixed-case\">TCP<\/jats:styled-content>) than the working side <jats:styled-content style=\"fixed-case\">SCM<\/jats:styled-content> and bilateral masseters (<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00\u00b705). The balancing side <jats:styled-content style=\"fixed-case\">SCM<\/jats:styled-content> activity reached its peak significantly further away from <jats:styled-content style=\"fixed-case\">TCP<\/jats:styled-content> than the other three tested muscles during chewing. Further studies with spatiotemporal variables included should be helpful to understand the roles of the head, neck and jaw muscles in orofacial and cervical dysfunctional problems.<\/jats:p>","DOI":"10.1111\/joor.12527","type":"journal-article","created":{"date-parts":[[2017,5,26]],"date-time":"2017-05-26T11:06:37Z","timestamp":1495796797000},"page":"594-601","source":"Crossref","is-referenced-by-count":15,"title":["An electromyographic study on the sequential recruitment of bilateral sternocleidomastoid and masseter muscle activity during gum chewing"],"prefix":"10.1111","volume":"44","author":[{"given":"S.\u2010X.","family":"Guo","sequence":"first","affiliation":[{"name":"State Key Laboratory of Military Stomatology &amp; National Clinical Research Center for Oral Diseases &amp; Shaanxi International Joint Research Center for Oral Diseases Department of Oral Anatomy and Physiology and TMD School of Stomatology The Fourth Military Medical University Xi \u2018an 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