[Excitability cycle of the Hoffmann reflex of the soleus in a constant pool of motoneurons. Changes in man as a function of age].

The study of the recovery cycle of the H reflex of the soleus, in constant pool, was made on 88 normal men of different ages. The recurrent inhibition has been demonstrated in most of the adults and elderly subjects. In young children, there were powerful inhibitory mechanisms, among which the Renshaw inhibition can be isolated.