Fig. 7

Motor neurons surrounded by microglia projected to the soleus. a A map indicating the localization of retrogradely labeled FG-positive cells after FG injection into the soleus. The FG-positive motor neurons are plotted on a standardized chart. b FG (blue)-positive motor neurons were attracted to Iba1-positive microglia (green) at L5. The white dotted line in b indicates the border between white matter and gray matter