Article 3 Muscle 3 adult 3 female 3 human 3 male 3 quadriceps femoris muscle 3 Auto-regressive 2 Backpropagation 2 Complex nonlinear system 2 Joints (anatomy) 2 Mean square error 2 Medicine 2 Muscle modeling 2 Neural network model 2 Neural networks 2 Non-linear model 2 Nonlinear systems 2 Quadriceps 2 artificial neural network 2 backpropagation 2 clinical article 2 controlled study 2 middle aged 2 nonlinear autoregressive 2 quadriceps muscle 2 Adult 1 Arthritis 1 Arthrogenic 1 Arthroscopic meniscal surgery 1