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. 2016 Oct 25;7:478. doi: 10.3389/fphys.2016.00478

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Copyright © 2016 Cappellini, Ivanenko, Martino, MacLellan, Sacco, Morelli and Lacquaniti.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Characteristics of EMG activity. (A) Ensemble averaged (mean + SD) EMG activity patterns of 22 bilateral leg muscles recorded in children with CP and TD children. EMG data are plotted vs. normalized gait cycle. (B) FWHM of EMGs as a function of age in children with hemiplegia, diplegia and TD children. Continuous lines represent exponential fittings. Note a monotonic decrement of FWHM in TD children. (C) CoA, FWHM and mean leg muscle EMGs (means + SD) for children with CP and TD children. (D) Co-activation index (CI) for RF-VL-VM vs. ST-BF and MG-LG-SOL vs. TA pairs of antagonist muscles. Asterisks denote significant differences with older TD children.