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  • Title: Influence of craniomandibular and cervical pain on the activity of masticatory muscles in individuals with Temporomandibular Disorder.
    Author: Ries LG, Graciosa MD, Medeiros DL, Pacheco SC, Fassicolo CE, Graefling BC, Degan VV.
    Journal: Codas; 2014; 26(5):389-94. PubMed ID: 25388072.
    Abstract:
    PURPOSE: This study aimed to establish the prevalence of pain in the craniomandibular and cervical spine region in individuals with Temporomandibular Disorders (TMD) and to analyze the effects of these disorders on the bilateral activation of anterior temporalis (AT) and masseter (MA) muscles during the masticatory cycle. METHODS: The participants were 55 female volunteers aged 18-30 years. The presence of TMD and craniomandibular and cervical spine pain was evaluated by applying the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) questionnaire and using a combination of tests for the cervical region. The muscle activity of AT and MA during the masticatory cycle was assessed using the symmetry and antero-posterior coefficient indices. RESULTS: The AT activity during the masticatory cycle is more asymmetric in individuals with TMD. The craniomandibular pain, more prevalent in these individuals, influenced these results. CONCLUSION: Individuals with TMD showed changes in the pattern activity of AT. The craniomandibular nociceptive inputs can influence the increase in asymmetry of the activation of this muscle.
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