Short-axon cells in the olfactory bulb: dendrodendritic synaptic interactions.

摘要: 1. In the rabbit olfactory bulb, analysis has been carried out of extracellular unitary responses in glomerular layer to nerve volleys. 2. Units responded single volleys with single, double, triple or longer repetitive spike discharges. The shortest initial latencies are consistent monosynaptic excitation from nerves; may reflect pathways polysynaptic connexions layer. 3. Like mitral and tufted cells, some units gave evidence activation by discrete bundles. This correlates recent anatomical for projections bundles glomeruli. 4. Facilitation took form lower thresholds shorter latencies, when testing paired weak strength at relatively short intervals (less than 40 msec). Supression raised thresholds, briefer discharges; this was particularly evident strong long intervals. 5. early period facilitation later suppression did not correlate recovery cycle nerves had an absolute refractory approximately 3 msec, relative 15-30 a small supernormal several hundred msec more. 6. that mediated dendrodendritic through periglomerular short-axon cells is discussed relation electronmicroscopical studies. results have implications similar cell dendrites other parts nervous system.