Effects of Head Posture on Cervical Muscle Thickness and Activity in Young Adults With and Without Temporomandibular Disorders

Autor(es)

Strini, P. J. S. A. ^{[1, 2]} ; Strini, P. H. S. A. ^[1] ; Barbosa, T. S. ^[3] ; Gaviao, M. B. D. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Dept Morphol, Piradcaba Dent Sch, UNICAMP, BR-13414903 Piracicaba - Brazil

^[2] Univ Fed Goias, Inst Biol Sci, Goiania, Go - Brazil

^[3] Univ Estadual Campinas, Dept Pediat Dent, Piradcaba Dent Sch, UNICAMP, BR-13414903 Piracicaba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF MUSCULOSKELETAL PAIN; v. 22, n. 1, p. 89-98, MAR 2014.
• Citações Web of Science: 1

Resumo

Objectives: To evaluate electrical activity {[}EMG] and muscular thickness by ultrasonography of sternocleidomastoid {[}SCM] muscles in young adults with temporomandibular disorders {[}TMD], and to determine the effects of head posture on these measures. Methods: The study subjects were recruited into a TMD group and a healthy normal control group. The TMD diagnoses were made using the Research Diagnostic Criteria for TMD. The control group subjects did not meet those TMD criteria. The head tilt was clinically evaluated in all subjects. Data were collected three times at rest, maximal clenching, flexion, and extension of the head, bilaterally. Shapiro-Wilks, Mann Whitney, Kruskal Wallis, unpaired t test, ANOVA and Tukey test, and correlation and logistic regression were applied {[}alpha=0.05]. Results: The TMD group consisted of 19 individuals {[}age 25.4 +/- 3.8 years]. The cControl groups consisted of 28 individuals {[}age 25.9 +/- 4.7 years]. The controls showed greater values in activity and thickness for the right SCM than TMD subjects during flexion and relaxation, respectively. The TMD group presented lower thickness for both muscles when the head was tilted to the right, except during extension. During clenching, EMG activity was significantly higher for the TMD group when the head was to the right. The right SCM showed lower activity during flexion in the TMD group. Ultrasonography and EMG were positively correlated for the right SCM during flexion when the head was to the right. For the other positions, the correlations were negative. The TMD group was more likely to present a lower SCM activity during flexion. Conclusions: The SCM thickness and activity are influenced by the presence of TMD during neck and mandibular movements, as well as the side of head tilt. (AU)

• Processo FAPESP: 09/00710-2 - Avaliação eletromiográfica e estrutural dos músculos masseter e esternocleidomastóideo em pacientes com disfunção temporomandibular em diferentes cargas de mordida
• Beneficiário: Paulinne Junqueira Silva Andresen Strini
• Modalidade de apoio: Bolsas no Brasil - Doutorado