The large synaptic complexes of the substantia gelatinosa.
D000818:Animals; D001369:Axons / Q000166:cytology; D002415:Cats; D003712:Dendrites / Q000166:cytology; D008854:Microscopy, Electron; D009474:Neurons / Q000502:physiology; D009475:Neurons, Afferent; D013116:Spinal Cord / Q000166:cytology*; D013194:Staining and Labeling; D013569:Synapses / Q000166:cytology* / Q000502:physiology; D009435:Synaptic Transmission