Figure 2

Soleus H-reflexes were evoked at epoch 5, 6, and 8 (circled). We stimulated the tibial nerve with a cathode placed in the popliteal fossa and an anode on the patella. The effective stimulus intensity used for the H-reflex measurements was the intensity to evoke a corresponding M-wave that is 25% of M _max for that epoch. We only accepted the measurements of H-waves where their preceding M-waves were 25 ± 10% of the corresponding M _max .