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The measurement was repeated after 15 min. with IS or HS, respectively. The target level of vertical bite-force was 15% of maximum voluntary contraction registered using an intra-oral device.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The average root-mean-square (RMS) values showed significantly lower (\n                      <jats:italic>p<\/jats:italic>\n                      &lt;0.001) EMG activity for all selected monopolar (14.9%) and bipolar (17.1%) derivations for the HS condition despite unchanged mean force. Bipolar EMG RMS values for the contralateral masseter did not change significantly. The centre of mass obtained from the interpolated monopolar RMS amplitude map showed a mean shift away from the injection site of 0.85mm (\n                      <jats:italic>p<\/jats:italic>\n                      &lt;0.001).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Experimental pain induced a general reduction of RMS EMG amplitude of the ipsilateral masseter and a small but significant shift away from the site of injection.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinical relevance<\/jats:title>\n                    <jats:p>The masticatory motor system seems to possess a unique adaptability to produce a constant force despite the presence of experimentally induced pain. This could represent a feature of the high resilience and adaptability of the stomatognathic system in acute painful conditions.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00784-026-06885-w","type":"journal-article","created":{"date-parts":[[2026,4,25]],"date-time":"2026-04-25T02:48:28Z","timestamp":1777085308000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Bite through pain \u2013 an experimental pain force-controlled study on EMG-activity of the masseter muscle"],"prefix":"10.1007","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6188-2973","authenticated-orcid":false,"given":"Johannes P.","family":"van Dijk","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sophia","family":"Terebesi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hans J.","family":"Schindler","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9524-8089","authenticated-orcid":false,"given":"Peter","family":"Svensson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ulrike","family":"Eiglsperger","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4612-4060","authenticated-orcid":false,"given":"Bernd G.","family":"Lapatki","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2887-8857","authenticated-orcid":false,"given":"Nikolaos Nikitas","family":"Giannakopoulos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,4,25]]},"reference":[{"key":"6885_CR1","doi-asserted-by":"publisher","first-page":"745","DOI":"10.1016\/0022-3913(60)90257-2","volume":"10","author":"J Travell","year":"1960","unstructured":"Travell J (1960) Temporomandibular joint pain referred from muscles of the head and neck. 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