Electromyographic analysis of the trapezius and the serratus anterior muscles in shoulder and pectoral girdle movements
Braz. j. morphol. sci
;
15(2): 151-6, jul.-dez. 1998. ilus
Artigo
em Inglês
| LILACS
| ID: lil-240752
RESUMO
The upper and lower portions of the trapezius muscle and the 4th, 5th and 6th bundles of the serratus anterior muscle were studied electromyographically during shoulder and pectoral girdle movements, in ten adultmales, aged 18 to 28 years, with no history of shoulder pathology. For this study a Nicolet Electronmyograph and surface electrodes were used. The signals were recorded as root mean square (RMS) values, expressedin microvolts. Wilcoxon and Friedman tests were done to a 5 (per cent) significance level. The results showed that there were no differences in the behaviour of the serratus anterior muscle bundles. In the shoulder abduction and flexion movements, the upper portionof the trapezius acted simultaneously with the serratus anterior muscle. In horizontal abdunction and adduction movements there was no prevalence of any of the muscles studied. In shoulder elevation, the upper portion of the trapezius muscle showed preponderant activity over its lower portion and over the serratus anterior muscle bundles. In the shoulder depression the activity of the lower portion of the trapezius muscle predominated over the serratus anterior muscle bundles, and the least activity was exhibited by the upper portion of the trapezius muscle.
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Índice:
LILACS (Américas)
Assunto principal:
Articulação do Ombro
/
Amplitude de Movimento Articular
/
Músculos
Tipo de estudo:
Fatores de risco
Limite:
Adolescente
/
Adulto
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Braz. j. morphol. sci
Assunto da revista:
Anatomia
Ano de publicação:
1998
Tipo de documento:
Artigo
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