Co-activação dos músculos flexores e extensores da articulação do joelho em condições isocinéticas.

 

Rui S. Gonçalves^1*

J. Páscoa Pinheiro²

 

[1] Escola Superior de Tecnologia da Saúde de Coimbra, Portugal.

[2] Universidade de Coimbra, Faculdade de Medicina e Faculdade de Ciências do Desporto e Educação Física, Portugal.

 

RESUMO

A co-activação dos músculos flexores e extensores do sistema articular do joelho tem sido amplamente examinada com recurso à electromiografia de superfície. Esta revisão tem com objectivo apresentar achados relativos à contribuição da actividade electromiográfica (EMG) antagonista para a acção motora do complexo do joelho, em condições isocinéticas. Os factores posição angular, tipo de acção muscular e velocidade angular influenciam os níveis de actividade EMG antagonista. Em condições isocinéticas, a activação antagonista contribui para a restrição do momento articular resultante e para a manutenção da estabilidade articular.

Palavras-chave: co-activação, joelho, electromiografia de superfície, dinamometria  isocinética.

 

ABSTRACT

Co-activation of the knee joint flexors and extensors muscles in isokinetics conditions.

The co-activation of the knee flexors and extensors muscles has been largely examined resorting to surface electromyography. The aim of this review is to present findings related to the contribution of the antagonist electromyographic (EMG) activity to the motor’s actions of the knee joint complex in isokinetics conditions. The factors angular position, type of muscle action and angular velocity influence the antagonist EMG activity levels. In isokinetics conditions the antagonist activation contributes to the restriction of the resultant joint moment and the maintenance of the joint stability.

Key Words: co-activation, knee, surface electromyography, isokinetic dynamometry.

 

 

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CORRESPONDÊNCIA

*Rui Soles Gonçalves

Curso de Fisioterapia

Escola Superior de Tecnologia da Saúde de Coimbra

Rua 5 de Outubro, S. Martinho do Bispo,  Apartado 7006

3040-162 Coimbra

PORTUGAL

ruigoncalves@estescoimbra.pt