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Neuromuscular interactions around the knee in children, adults and elderly

World Journal of Orthopedics 2014年第4期5卷 469-485页

作者： Eleftherios Kellis Lida Mademli Dimitrios Patikas nikolaos kofotolis Laboratory of Neuromechanics School of Physical Education and Sport Sciences at Serres Aristotle University of Thessaloniki

Although injury and neuromuscular activation patterns may be common for all individuals, there are certain factors which differentiate neuromuscular activity responses between children, adults and elderly. The purpose of this study is to review recent evidence on age differences in neural activation and muscle balances around the knee when performing single joint movements. Particularly, current evidence indicates that there are some interesting similarities in the neuromuscular mechanisms by which children or the elderly differ compared with adults. Both children and elderly display a lower absolute muscle strength capacity than adults which cannot fully be explained by differences in muscle mass. Quadriceps activation failure is a common symptom ofall knee injuries, irrespective of age but it is likely that its effect is more evident in children or adults. While one might expect that antagonist co-activation would differ between age categories, it appears that this is not the case. Although hamstring: quadriceps ratio levels are altered after knee injury, it is not clear whether this is an age specific response. Finally, evidence suggests that both children and the elderly display less stiffness of the quadriceps muscle-tendon unit than adults which affects their knee joint function.

关键词： Knee stability Knee joint Stiffness Electromyography Strength imbalance Aging,Co-activation Age Injuries

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