Can evoked phonomyography be used to recognize fast and slow muscle in man?
Int J Sports Med
; 13(1): 65-8, 1992 Jan.
Article
em En
| MEDLINE
| ID: mdl-1544737
ABSTRACT
The present study is aimed at ascertaining if muscle sound might be used as a detector of the contractile properties of individual human muscles "in vivo". In order to test this hypothesis, Soleus muscle (slow) and Vastus Lateralis Femoris muscle (fast) were investigated in three healthy subjects during electrically elicited contractions. Evoked phonomyograms were obtained from isometric single twitch contractions using a microphonic apparatus. Time and frequency domain analysis were performed. Evoked phonomyogram rising time values obtained from the two muscles are significantly different (p less than .01) and this difference is clearly due to their different mechanical properties. The power spectrum of all signals was obtained by means of harmonic analysis routine and mean frequency thus obtained was taken into account. Power spectrum values are approximately 1.5 times greater in fast muscle than in slow muscle (p less than .01). These findings lead us to the conclusion that evoked phonomyography can be considered a useful technique for the assessment of mechanical properties of individual human muscles.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Som
/
Contração Muscular
/
Miografia
Limite:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Int J Sports Med
Ano de publicação:
1992
Tipo de documento:
Article
País de afiliação:
Itália