HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Getchell, T V Articles by Shepherd, G M Search for Related Content PubMed PubMed Citation Articles by Getchell, T V Articles by Shepherd, G M

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

This article has been cited by other articles:

				G. Lowe Flash Photolysis Reveals a Diversity of Ionotropic Glutamate Receptors on the Mitral Cell Somatodendritic Membrane J Neurophysiol, September 1, 2003; 90(3): 1737 - 1746. [Abstract] [Full Text] [PDF]

				A. R. McQuiston and L. C. Katz Electrophysiology of Interneurons in the Glomerular Layer of the Rat Olfactory Bulb J Neurophysiol, October 1, 2001; 86(4): 1899 - 1907. [Abstract] [Full Text] [PDF]

				S. A. Baccus Synaptic facilitation by reflected action potentials: Enhancement of transmission when nerve impulses reverse direction at axon branch points PNAS, July 7, 1998; 95(14): 8345 - 8350. [Abstract] [Full Text] [PDF]

				M. Puopolo and O. Belluzzi Inhibitory Synapses Among Interneurons in the Glomerular Layer of Rat and Frog Olfactory Bulbs J Neurophysiol, July 1, 1998; 80(1): 344 - 349. [Abstract] [Full Text] [PDF]

				A. Keller, S. Yagodin, V. Aroniadou-Anderjaska, L. A. Zimmer, M. Ennis, N. F. Sheppard Jr, and M. T. Shipley Functional Organization of Rat Olfactory Bulb Glomeruli Revealed by Optical Imaging J. Neurosci., April 1, 1998; 18(7): 2602 - 2612. [Abstract] [Full Text] [PDF]

				R. Betarbet, R. Turner., V. Chockkan, M. R. DeLong, K. A. Allers, J. Walters, A. I. Levey, and J. T. Greenamyre Dopaminergic Neurons Intrinsic to the Primate Striatum J. Neurosci., September 1, 1997; 17(17): 6761 - 6768. [Abstract] [Full Text] [PDF]