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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Electromyographic analysis of the orbicularis oris muscle in oralized deaf individuals

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Author(s):
Simone Cecílio Hallak Regalo [1] ; Mathias Vitti [2] ; Maria Tereza Bagaiolo Moraes [3] ; Marisa Semprini [4] ; Cláudia Maria de Felício [5] ; Maria da Glória Chiarello de Mattos [6] ; Jaime Eduardo Cecílio Hallak ; Carla Moreto Santos [8]
Total Authors: 8
Affiliation:
[1] University of São Paulo. Faculty of Dentistry of Ribeirão Preto. Department of Morphology, Stomatology and Physiology - Brasil
[2] University of São Paulo. Faculty of Dentistry of Ribeirão Preto. Department of Morphology, Stomatology and Physiology - Brasil
[3] UNAERP. Department of Speech Pathology and Audiology - Brasil
[4] University of São Paulo. Faculty of Dentistry of Ribeirão Preto. Department of Morphology, Stomatology and Physiology - Brasil
[5] UNAERP. Department of Speech Pathology and Audiology - Brasil
[6] University of São Paulo. Faculty of Dentistry of Ribeirão Preto. Department of Dental Materials and Prosthodontics - Brasil
[8] University of São Paulo. Faculty of Dentistry of Ribeirão Preto. Department of Dental Materials and Prosthodontics - Brasil
Total Affiliations: 8
Document type: Journal article
Source: Brazilian Dental Journal; v. 16, n. 3, p. 237-242, 2005-12-00.
Abstract

Electromyography has been used to evaluate the performance of the peribuccal musculature in mastication, swallowing and speech, and is an important tool for analysis of physiopathological changes affecting this musculature. Many investigations have been conducted in patients with auditory and speech deficiencies, but none has evaluated the musculature responsible for the speech. This study compared the electromyographic measurements of the superior and inferior fascicles of the orbicularis oris muscle in patients with profound bilateral neurosensorial hearing deficiency (deafness) and healthy volunteers. Electromyographic analysis was performed on recordings from 20 volunteers (mean age of 18.5 years) matched for gender and age. Subjects were assigned to two groups, as follows: a group formed by 10 individuals with profound bilateral neurosensorial hearing deficiency (deaf individuals) and a second group formed by 10 healthy individuals (hearers). Five clinical conditions were evaluated: suction, blowing, lip projection and compression, and production of the syllable "Pa". It was found that the deaf patients presented muscle hyperactivity in all clinical conditions, and that the inferior fascicle of the orbicularis oris muscle showed higher electromyographic activity rates, suggesting the need for a hearing-speech treatment with emphasis on oral motricity. (AU)