Artículos de revistas
Effect Of Congenital Blindness On Emg Activity Of The Facial Muscles
Electromyography And Clinical Neurophysiology. , v. 48, n. 2, p. 117 - 124, 2008.
The aim of this work was to analyze electromyographically the facial muscles: orbicularis oris (upper and lower fascicles), orbicularis oculi (right and left lateral portions) and frontal, in blind and clinically normal (control) individuals, in various clinical conditions. Electromyographic averages of all data collected were normalized by maximal voluntary contraction of the studied muscles and statistical analysis was performed by Student's t test, using "Statistical Package for the Social Sciences" software - SPSS 12.0 (Chicago, IL). It was found that electromyographic alterations occur in the facial musculature that influences facial expressions of individuals. Results for the orbicularis oris muscle demonstrated that myoelectric activity among blind and control subjects was greater for the control group at muscular rest, blowing, and in labial projection. Electromyographic analysis of the orbicularis oculi among blind and control subjects in three clinical conditions studied demonstrated that activity was greater for the control group at muscular rest, blinking, and forced blinking. For the frontal muscles were demonstrated that electromyographic activity was greater for blind individuals. These data suggest the influence of congenital blindness on muscular development, including alterations in electromyographic activity of skin musculature in individuals with visual impairment.482117124BASMAJIAN, J.V., DE LUCA, C.J., (1985) Muscles alive: Their function revealed by electromyography, , Williams and Wilkins, BaltimoreCOSTA, C.S.L., DEL PRETTE, A., CIA, F., DEL PRETTE, G., Sentimentos expressos por gêmeas idênticas (cega e vidente): Comparando três procedimentos de identificação. 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