Fig. 6.

Association between measures of walking performance and overall motor module generalization and recruitment of shared modules 1–3 in the paretic leg of individuals poststroke (S1–S9). Module numbers correspond to the shared modules identified across all subjects illustrated in Fig. 5. A: motor module generalization was positively correlated with walking speed and negatively correlated with step width and step length asymmetry. B: recruitment of a module that resembled shared module 1 was associated with increased walking speed, reduced step width, and reduced step length asymmetry (e.g., values becoming closer to 0.5, which represents perfect symmetry of step lengths). C: recruitment of a module that resembled shared module 2 was associated with reduced step width, step length asymmetry, and stride time variability. D: recruitment of a module that resembled shared module 3 was associated with decreased walking speed, increased step length asymmetry, and increased stride time variability. Symmetric step lengths occur at values of 0.5, and values above symmetry occur due to longer paretic than nonparetic steps.