Fig. 1.

Examples of stretch reflexes, locomotor EMG activity, and ankle joint motion in a participant without known neurological injuries. aM1, M2, and M3 soleus stretch reflexes elicited by a rapid 6° ankle dorsiflexion (250°/s) during standing. b Ankle joint motion and soleus and TA EMG activity during walking in a normal subject. With eight equal bins of the step cycle starting from foot contact, bins 1–4 correspond to the stance phase, bin 5 to the stance-swing transition, and bins 6–8 to the swing phase