title: Short intrinsic circuit in the periaqueductal gray matter of the cat.
abstract: In heavily impregnated Golgi material of cat periaqueductal gray matter (PAG), we were able to follow the course of early axon collaterals to their endings on the soma of neighboring neurons. A short intrinsic circuit is therefore created. Combined Golgi and electron microscope observation give evidence of the inhibitory action of this circuit.
mesh_terms: D000818:Animals; D001369:Axons / Q000502:physiology; D002415:Cats; D006056:Golgi Apparatus / Q000648:ultrastructure; D009434:Neural Pathways / Q000502:physiology; D009474:Neurons / Q000145:classification / Q000648:ultrastructure; D010487:Periaqueductal Gray / Q000166:cytology / Q000502:physiology* / Q000648:ultrastructure