Patterns of electromyographic activity in subjects with different skeletal facial types.

R. Miralles*, R. Hevia, L. Contreras, R. Carvajal, R. Bull, A. Manns

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


Integrated electromyographic activity of masseter and anterior temporal muscles was recorded using bipolar surface electrodes in 33 young adults. Subjects were skeletally classified according to ANB angle reading corrected both for maxillary position and rotation of the jaw. Postural activity for both muscles was higher in Class III subjects than in Class I and Class II, whereas in Class I and II subjects activity was similar. During swallowing, masseter muscle activity in Class III subjects was higher than Classes I and II, whereas anterior temporal muscle activity was not different between Classes III and I. During maximal voluntary clenching, activity was not different among classes. High correlations between electromyographic activity and corrected ANB angle as well as with overjet were observed. Skeletal classification used in the present study may have clinical relevance regarding treatment and prognosis, as well as in the assessment of the relationship between muscular activity and craniofacial characteristics.

Original languageEnglish
Pages (from-to)277-284
Number of pages8
JournalAngle Orthodontist
Issue number4
StatePublished - Dec 1991
Externally publishedYes


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