Plasticity in an electrosensory system. III. Contrasting properties of spatially segregated dendritic inputs

Journal of Neurophysiology
J Bastian

Abstract

Efferent neurons of the first-order electrosensory processing center of the brain, the electrosensory lateral line lobe (ELL), receive electroreceptor afferent input as well as feedback inputs descending from higher centers. These ELL efferents, pyramidal cells, adaptively filter predictable patterns of sensory input while preserving sensitivity to novel stimuli. The filter mechanism involves integration of centrally generated predictive inputs with the afferent inputs being canceled. The predictive inputs, referred to as "negative image" inputs, terminate on pyramidal cell apical dendrites and generate responses that are opposite those resulting from the predictable afference, hence integration of these signals results in attenuation of pyramidal cell responses. The system also shows a robust form of plasticity; the pyramidal cells learn, with a time course of a few minutes, to cancel new patterns of repetitive inputs. This is accomplished by adjusting the strength of excitatory and inhibitory apical dendritic inputs according to an anti-Hebbian learning rule. This study focuses on the properties of two separate pathways that convey descending information to pyramidal cell apical dendrites. One pathway terminates proximally, n...Continue Reading

References

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Citations

Feb 10, 1999·The Journal of Comparative Neurology·V Z HanY Sugawara
Jan 12, 2001·Journal of Neurophysiology·J Bastian, J Nguyenkim
Mar 19, 2005·Journal of Neurophysiology·Nathaniel B SawtellCurtis C Bell
Oct 6, 2018·ELife·Chengjie G HuangMaurice J Chacron
Sep 7, 2007·Biological cybernetics·Kazuhisa FujitaTakeshi Kambara
Jun 26, 2018·PLoS Biology·Michael G MetzenMaurice J Chacron
May 20, 1999·The Journal of Comparative Neurology·L Maler, M T Hincke
Feb 24, 2006·Journal of Neurophysiology·Maurice J Chacron
Oct 5, 2002·Journal of Neurophysiology·John E Lewis, Leonard Maler
Apr 27, 2002·Journal of Neurophysiology·Anne-Marie M OswaldLeonard Maler
Apr 13, 2012·The Journal of Experimental Biology·Sarah A StamperEric S Fortune
Nov 11, 2008·Journal of Physiology, Paris·Gerri MilevaJohn E Lewis

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