Xabier Soto-Goñi1, María García-Gonzalez2, Ignacio Ardizone-García2, Teresa Sánchez-Sánchez2, Laura Jiménez-Ortega3,4. 1. Department of Psychobiology and Behavioral Sciences Methods, Faculty of Odontology, Complutense University of Madrid, Plaza Ramón Y Cajal S/N Ciudad Universitaria, 28040, Madrid, Spain. xabierandersoto@ucm.es. 2. Department of Conservative and Prosthetic Dentistry, Faculty of Odontology, Complutense University of Madrid, Madrid, Spain. 3. Department of Psychobiology and Behavioral Sciences Methods, Faculty of Odontology, Complutense University of Madrid, Plaza Ramón Y Cajal S/N Ciudad Universitaria, 28040, Madrid, Spain. 4. Center of Human Evolution and Behavior, UCM-ISCIII, Madrid, Spain.
Abstract
OBJECTIVES: This study aims to investigate how emotional information and pain-related information affect the activity of the masticatory muscles in participants with awake bruxism and controls. MATERIAL AND METHODS: Different videos and texts, with positive, negative, and neutral valence or related to pain, were presented to a sample of university students, while their electromyographic (EMG) activity around the masseter muscle and their skin conductance were recorded. Two groups were selected, with 24 subjects each: one group of subjects with definitive awake bruxism (confirmed by posterior EMG activity) who also suffered from moderate jaw discomfort, and another group of subjects without bruxism. RESULTS: The results demonstrated that the subjects with definitive awake bruxism displayed greater muscular activity when presented videos and texts with negative valence, especially when related to pain, than the non-bruxist group. CONCLUSIONS: This study supports the idea that persons with bruxism who also suffer moderate levels of jaw discomfort present greater bruxism activity when watching pain-related stimuli, and to a lesser extent when watching negative stimuli. CLINICAL RELEVANCE: The increased muscular activity induced by negative and pain-related information might contribute to pain exacerbation and perpetuation in persons with bruxism who suffer from discomfort.
OBJECTIVES: This study aims to investigate how emotional information and pain-related information affect the activity of the masticatory muscles in participants with awake bruxism and controls. MATERIAL AND METHODS: Different videos and texts, with positive, negative, and neutral valence or related to pain, were presented to a sample of university students, while their electromyographic (EMG) activity around the masseter muscle and their skin conductance were recorded. Two groups were selected, with 24 subjects each: one group of subjects with definitive awake bruxism (confirmed by posterior EMG activity) who also suffered from moderate jaw discomfort, and another group of subjects without bruxism. RESULTS: The results demonstrated that the subjects with definitive awake bruxism displayed greater muscular activity when presented videos and texts with negative valence, especially when related to pain, than the non-bruxist group. CONCLUSIONS: This study supports the idea that persons with bruxism who also suffer moderate levels of jaw discomfort present greater bruxism activity when watching pain-related stimuli, and to a lesser extent when watching negative stimuli. CLINICAL RELEVANCE: The increased muscular activity induced by negative and pain-related information might contribute to pain exacerbation and perpetuation in persons with bruxism who suffer from discomfort.
Authors: Tina Veronica Imbriglio; Massieh Moayedi; Bruce Victor Freeman; Howard Charles Tenenbaum; Michael Thaut; Iacopo Cioffi Journal: Headache Date: 2020-09-30 Impact factor: 5.887
Authors: Xabier Ander Soto-Goñi; Francisco Alen; Leticia Buiza-González; Danielle Marcolino-Cruz; Teresa Sánchez-Sánchez; Ignacio Ardizone-García; Fernando Aneiros-López; Laura Jiménez-Ortega Journal: Front Neurol Date: 2020-12-09 Impact factor: 4.003