Differentiation of synaptic bulbs in Clarke's column.
D000818:Animals; D001369:Axons / Q000166:cytology*; D000882:Haplorhini; D006652:Histological Techniques; D008297:Male; D008854:Microscopy, Electron; D009046:Motor Neurons; D013116:Spinal Cord / Q000166:cytology*; D013194:Staining and Labeling; D013569:Synapses / Q000166:cytology*