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Efeito do cold pressor test na sensação dolorosa, na atividade eletrodérmica e eletromiográfica dos músculos da face
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| PG_12257 | 697.98 KB | Adobe PDF |
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Abstract(s)
Introdução: A indução da dor de uma forma experimental contribuiu para o avanço na compreensão dos mecanismos relacionados com a sensação da dor. O cold pressor test (CTP) é um método usualmente utilizado nas investigações experimentais relacionadas com a dor. A dor tem a capacidade de mudar a expressão facial e de ativar o sistema nervoso simpático. Objetivo: O objetivo do presente estudo é avaliar a resposta eletromiográfica dos músculos da frontal e masseter, bilateralmente, e eletrodérmica aquando da realização do CPT Metodologia: Onze participantes saudáveis e voluntários (mediana de idade 29,00±3,00), foram recrutados e avaliados através da eletromiografia e da atividade eletrodérmica (AED) em três momentos: em repouso, resposta imediata ao estímulo e resposta tardia ao estímulo. Utilizou-se a escala numérica da dor para avaliar a intensidade da dor sentida, aquando a imersão da mão não-dominante em água fria (4˚) durante 1 minuto. Foram avaliados dor, AED e atividade eletromiográfica dos músculos masseter e frontal (medial e lateral) bilateralmente, perante o estímulo do CPT. Resultados: Foram observadas diferenças significativas entre o repouso, resposta imediata e reposta tardia ao estímulo nos músculos avaliados (p<0,05), exceto no músculo frontal lateral esquerdo. Relativamente à AED, foi possível observar diferenças significativas entre os 3 momentos de avaliação (α=0,00).Na análise de correlação, foi possível denotar uma correlação positiva, significativa e forte (spearman’s rho=0,706, α=0,015) entre a resposta imediata ao estímulo do músculo frontal lateral direito e a intensidade da dor sentida. Conclusão: Foram observadas alterações de expressão facial e da atividade eletrodérmica aquando um estímulo doloroso induzido pelo CPT.
Introduction: Experimental induction of pain has enabled the advance of our understanding on the mechanisms related to the pain sensation. The cold pressor test (CPT) has been widely used in research of experimental pain modalities. Pain has the potential to change facial mimicry and deregulate the sympathetic system. Objective: This present study aims to evaluate the electromyographic response of the masseter and frontal muscles and electrodermal skin activity (EDA). Methods: Eleven healthy volunteer participants (aged 29,00±3,00) were evaluated by surface EMG and EDA, on three occasions: rest, immediate post-stimulation and late post-stimulation. A numeric pain scale was used to assess the magnitude of pain induced by submerging the non-dominant hand in cold water (4˚C) for 1 minute. The effect of the CPT were observed on pain, EDA and electromyography activities of both masseter and frontal muscles. Results: There were significant differences between the three evaluated moments, for all the evaluated muscles (p<0,05), except for the lateral left frontal muscle, which did not show significant differences. The EDA also showed significant differences between rest, immediate- and post-stimulation (α=0,00). Analysis of the correlation showed a positive, significant and strong correlation (spearman’s rho=0,706, α=0,015), between immediate post-stimulation response of the right frontal lateral muscle and intensity of experienced pain. Conclusion: Changes in facial expression and electrodermal activity were observed during a painful stimulus induced by CPT.
Introduction: Experimental induction of pain has enabled the advance of our understanding on the mechanisms related to the pain sensation. The cold pressor test (CPT) has been widely used in research of experimental pain modalities. Pain has the potential to change facial mimicry and deregulate the sympathetic system. Objective: This present study aims to evaluate the electromyographic response of the masseter and frontal muscles and electrodermal skin activity (EDA). Methods: Eleven healthy volunteer participants (aged 29,00±3,00) were evaluated by surface EMG and EDA, on three occasions: rest, immediate post-stimulation and late post-stimulation. A numeric pain scale was used to assess the magnitude of pain induced by submerging the non-dominant hand in cold water (4˚C) for 1 minute. The effect of the CPT were observed on pain, EDA and electromyography activities of both masseter and frontal muscles. Results: There were significant differences between the three evaluated moments, for all the evaluated muscles (p<0,05), except for the lateral left frontal muscle, which did not show significant differences. The EDA also showed significant differences between rest, immediate- and post-stimulation (α=0,00). Analysis of the correlation showed a positive, significant and strong correlation (spearman’s rho=0,706, α=0,015), between immediate post-stimulation response of the right frontal lateral muscle and intensity of experienced pain. Conclusion: Changes in facial expression and electrodermal activity were observed during a painful stimulus induced by CPT.
Description
Projeto de Graduação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Licenciada em Fisioterapia
Keywords
Eletromiografia Cold pressor test Expressão facial Dor Atividade eletrodérmica Electromyography Cold pressor test Facial expression Pain Electrodermal skin activity