Figure 2. Modulation of soleus H-reflexes and MEPs prior to plantar- and dorsiflexion.

The amplitude of soleus MEPs was increased prior to both dorsiflexion and plantar flexion whereas the amplitude of the soleus H-reflex was only increased prior to plantar flexion. Prior to dorsiflexion, the soleus H-reflex was strongly depressed as has been shown by Crone & Nielsen (1989). Data from one subject.