Fig. 4

Changes in lower limb muscle activity during biofeedback walking. Median muscle activity for the more-affected limb during early adaptation (strides 1–30) to sensorimotor (SM), audiovisual (AV), and combined (AV + SM) biofeedback at the pre-acclimation (top), post-acclimation (middle), and follow-up (bottom) visits is displayed. For each visit, data were normalized to the 95th percentile of each participant’s first baseline phase. Baseline trends display median (IQR). Note that the trends shown for the tibialis anterior, vastus lateralis, and semitendinosus represent six of the eight participants tested, as two had to be removed due to loss of the vastus lateralis signal during collection