Figure 4

Group comparisons of the coactivation of knee extensors during the plantarflexion task in 13 stroke and 10 healthy participants. Mean levels of coactivation of vastus lateralis (A) and rectus femoris (B) (expressed as a % of their maximal EMG) during the maximal activation of soleus (at Sol max) and gastrocnemius lateralis (at GL max) for the plantarflexion task. Vertical bars = 1 SEM. Asterisks represent significant differences between the stroke group (black bars) and the control group (white bars) (* p ≤ 0.05; ** p ≤ 0.01).