Short intrinsic circuit in the periaqueductal gray matter of the cat.
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.
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