ABSTRACT
Objetivo: Determinar a confiabilidade intra e interexaminadores das medidas ultrassonográficas do músculo longo do pescoço em mulheres com e sem migrânea. Métodos: Trata-se de um estudo transversal, avaliando 20 mulheres com idade entre 20 e 24 anos (22 ± 2). Foram realizadas duas avaliações ultrassonográficas da área de secção transversa (cm2) do músculo longo do pescoço, em repouso e em contração com intervalo de uma semana entre elas, por dois examinadores cegos. Para análise estatística, foram utilizados o coeficiente de correlação intraclasse (ICC) e os limites de concordância. Resultados: A confiabilidade intraexaminador do grupo com migrânea, em repouso e contração, foi excelente à direita e moderada à esquerda; no grupo sem migrânea variou de excelente (0,93) no repouso, à pobre (0,35) na contração. A confiabilidade interexaminadores foi excelente (ICC > 0,75) à direita e à esquerda, no repouso, em ambos os grupos. Na contração, variou de moderada (ICC = 0,71), no lado esquerdo no grupo sem migrânea, à excelente (ICC > 0,75) nas demais mensurações. Foram observados baixos limites de concordância dos intervalos de confiança em todas as medidas. Conclusão: Foram observados baixos limites de concordância, de acordo com o intervalo de confiança, na confiabilidade das medidas ultrassonográficas do músculo longo do pescoço em mulheres com migrânea. (AU)
Objective: To determine intra and inter-rater reliability of ultrasonographic measures of the longus colli muscle in women with and without migraine. Methods: This is a cross-sectional study involving 20 women aged between 20 and 24 years (22 ± 2). Two ultrasonographic assessments, conducted one week apart by two blind examiners, were made of the crosssectional area (cm2) of the longus colli muscle, at rest and in contraction. Statistical analysis used the intraclass correlation coefficient (ICC) and limits of agreement. Results: Intra-rater reliability in the group with migraine, at rest and in contraction, was excellent on the right and moderate on the left; in the group without migraine it ranged from excellent (0.93) at rest to poor (0.35) in contraction. Inter-rater reliability was excellent (ICC > 0.75) at rest on the right and left, in both groups. In contraction, it ranged from moderate (ICC = 0.71) on the left in the group without migraine to excellent (ICC > 0.75) in the other measurements. Low limits of agreement were observed for the confidence intervals in all the measures. Conclusion: According to the confidence interval, low limits of agreement were observed, regarding the reliability of ultrasonographic measures of the longus colli muscle in women with migraine.(AU)
Subject(s)
Humans , Female , Adult , Migraine Disorders , Neck Muscles , UltrasonographyABSTRACT
Background: Central and peripheral mechanisms may be involved in migraine and tension-type headache pathogenesis, however the role of muscle disorders in their pathophysiological mechanisms remains unclear. Objectives: To assess the association between the presence of migraine or tension-type headache and changes in longus colli muscle dimensions and sternocleidomastoid muscle activity. Method: An observational study with 48 women comparing the following groups: migraine (n=21), tension-type headache (n=16), and control (n=11). The cross-sectional area, lateral and anteroposterior dimensions, and shape ratio of the longus colli muscle were measured using ultrasound. The activation of the sternocleidomastoid muscle was assessed by signal amplitude and the decline in median frequency using surface electromyographic analysis. Results: The dimensions of the longus colli muscle did not differ between groups (p>0.05). Post-test analysis showed lower sternocleidomastoid muscle activation on both sides, at the onset of contraction, in the group with tension-type headache when compared to the control group {right sternocleidomastoid [tension-type headache: 0.39 (0.30-0.49); control: 0.58 (0.42-0.76); p=0.026] and left sternocleidomastoid [tension-type headache: 0.39 (0.31-0.48); control: 0.60 (0.42-0.79); p=0.039], Tukey's post hoc test}. There was no difference between the three groups in sternocleidomastoid muscle activation, on both sides, at the end of contraction (p>0.05). Intergroup analysis showed no difference in the rate of decline in median frequency (p>0.05). Conclusion: The group with tension-type headache exhibited less activation at the onset of sternocleidomastoid muscle contraction. No association was observed between the presence of headache and alterations in longus colli muscle dimensions, median frequency, and sternocleidomastoid muscle activation at the end of contraction. .