Presynaptic organelles and junctional integrity.
D000818:Animals; D000882:Haplorhini; D007365:Intercellular Junctions; D008854:Microscopy, Electron; D008928:Mitochondria / Q000502:physiology; D009046:Motor Neurons / Q000166:cytology; D013116:Spinal Cord / Q000166:cytology; D013194:Staining and Labeling; D013569:Synapses; D013570:Synaptic Membranes / Q000502:physiology; D013572:Synaptic Vesicles; D013997:Time Factors