Stomathognatic system function in indigenous people from Brazilian Xingu villages: An electromyographic analysis

Autor: Simone Cecílio Hallak Regalo, Paulo Batista de Vasconcelos, Wilson Mestriner-Junior, Selma Siéssere, Carla Moreto Santos, Isabela Hallak Regalo, Fernando José Dias, Marcelo Palinkas, Jaime Eduardo Cecílio Hallak
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Male
Muscle Physiology
Muscle Functions
Physiology
Digestive Physiology
Social Sciences
Electromyography
Geographical locations
Masseter muscle
Eating
0302 clinical medicine
Postural Balance
Medicine and Health Sciences
Medicine
Biomechanics
Orthodontics
education.field_of_study
Multidisciplinary
Electromyographic analysis
medicine.diagnostic_test
Masticatory force
Indigenous Populations
MASTIGAÇÃO
Laterality
Female
Brazil
Research Article
Adult
Adolescent
Science
Population
Temporal Muscle
Indigenous
03 medical and health sciences
Young Adult
Dentition
Humans
education
Indigenous Peoples
Demography
Nutrition
business.industry
Masseter Muscle
Biology and Life Sciences
030206 dentistry
South America
Diet
Food
Anthropology
Mastication
People and places
business
Physiological Processes
Musculoskeletal Mechanics
030217 neurology & neurosurgery
Zdroj: PLoS ONE
PLoS ONE, Vol 15, Iss 12, p e0243495 (2020)
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
ISSN: 1932-6203
Popis: The maintenance of postural balance can be influenced by the lifestyle of a population. This study aimed to determine the electromyographic activity of the masseter and temporalis muscles during mandibular tasks and habitual and non-habitual chewing in indigenous individuals to reveal the differences among white Brazilian individuals. Sixty Brazilians (18 and 28 years) were divided into two groups: 30 Xingu indigenous individuals and 30 white Brazilian individuals, with 20 men and 10 women in each group. The individuals were assessed using the normalized electromyographic activity of mandibular tasks (rest, protrusion, right and left laterality) and electromyographic activity of masticatory cycles in habitual (peanuts and raisins) and non-habitual (Parafilm M) chewing. Data were analyzed using Student’s t-test (p < .05). Comparisons between the groups demonstrated significant differences. Indigenous individuals group presented a decrease in the normalized electromyographic activity of the masticatory muscles during mandibular rest [right masseter (p = .002) and left masseter (p = .004) muscles]. There was increase in the normalized electromyographic activity during protrusion [left temporal (p = .03) muscle]. There was increase in the electromyographic activity during chewing: peanuts [right masseter (p = .001), left masseter (p = .001) and right temporal (p = .01) muscles], raisins [right masseter (p = .001), left masseter (p = .002), right temporal (p = .008), left temporal (p = .01) muscles] and Parafilm M [left masseter muscle (p = .05)]. From the findings of this study, we concluded that in the comparison between indigenous and white individuals, positive changes were observed in the electromyographic pattern of the masticatory muscles in the mandibular postural conditions, with greater masticatory efficiency in the indigenous group.
Databáze: OpenAIRE
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