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Fig. 2 | Journal of NeuroEngineering and Rehabilitation

Fig. 2

From: Neuro-musculoskeletal simulation of instrumented contracture and spasticity assessment in children with cerebral palsy

Fig. 2

Knee moment-angle and muscle force-length curves. a Knee moment-angle curve for typically developing (TD, grey) and cerebral palsy (CP, black) children, averaged over all subjects. Inverse dynamic results of the measurement are shown (dashed), as well as the optimized results of the muscle analysis (solid). b. Active and passive muscle force-length curves, based on the optimized passive properties S and K as averaged over all TD (thick grey) and CP (thick black) subjects, for hamstrings (solid) and vasti (dashed). The TD vasti curve mostly underlies the CP vasti curve. Default active and passive curves (thin lines) are based on Thelen (2003) and typically assumed equal for all muscles, both only scaling in amplitude to maximum isometric muscle force [33]

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