Fig. 7.
Crossed reflex response in right vastus lateralis (VLr) and right tibialis anterior (TAr) depends on muscle activity status before nerve stimulation during walking. A and B: electromyographic recording of the contralateral semitendinosus and the contralateral tibialis anterior in resting (black traces) and the two different states during walking: when the muscle was not active (red traces) or active (blue traces) before the tibial nerve (A) or the sural nerve (B) stimulation. C and D: relative counts (percentages) of muscle responses, as active or silent within the first 10 ms after stimulation of tibial nerve in 7 experiments (C) or the sural nerve in 5 experiments (D). Gsl, left gastrocnemius; Ipr, right iliopsoas; Str, right semitendinosus; Gsr, right gastrocnemius.