[Electromyography-controlled muscle rehabilitation--knee injuries]

Surface is a noninvasive, mostly nonreactive, objective measuring procedure for evaluation of the degree of muscle activation. It allows for accurate assessments of the neuromuscular system and description of adaptations resulting from injury. Decreases in torque, EMG amplitude and EMG frequency occur as a result of knee joint injuries. Efficiency checks and evaluations of training programs and neuromuscular treatment can be done. Decreases in torque, EMG amplitude and EMG frequency found after knee joint injury (cruciate ligament, meniscus) are due to intraarticular and periarticular afferent processes. 12 weeks postoperatively, the neuromuscular deficits from cruciate ligament injury have increased. While complete recovery can be achieved following meniscus fixation (more than 1 year postoperatively), cruciate ligament injuries lead to chronically reduced EMG median frequencies.