Figure 5.

Recruitment of muscle synergies common to perturbation responses during standing and walking. W₁, W₂, and W₃ were used in (A) standing perturbation responses as well as perturbation responses during (B) slow and (C) self-selected walking. W₂ was recruited for backward perturbations in all conditions, whereas W₃ was recruited for medial/lateral perturbations. W₁ was recruited for anterior/posterior perturbations in standing perturbation responses, and for anterior and lateral perturbations in walking perturbation responses.