JN AJP: Gastrointestinal and Liver Physiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Neurophysiol 84: 189-204, 2000;
0022-3077/00 $5.00
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Web of Science (33)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Kreiman, G.
Right arrow Articles by Gabbiani, F.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Kreiman, G.
Right arrow Articles by Gabbiani, F.

The Journal of Neurophysiology Vol. 84 No. 1 July 2000, pp. 189-204
Copyright ©2000 by the American Physiological Society

Robustness and Variability of Neuronal Coding by Amplitude-Sensitive Afferents in the Weakly Electric Fish Eigenmannia

Gabriel Kreiman,1 Rüdiger Krahe,2 Walter Metzner,2 Christof Koch,1 and Fabrizio Gabbiani1

 1Computation and Neural Systems Program, Division of Biology, 139-74 California Institute of Technology, Pasadena 91125; and  2Department of Biology, University of California at Riverside, Riverside, California 92521-0427

Kreiman, Gabriel, Rüdiger Krahe, Walter Metzner, Christof Koch, and Fabrizio Gabbiani. Robustness and Variability of Neuronal Coding by Amplitude-Sensitive Afferents in the Weakly Electric Fish Eigenmannia. J. Neurophysiol. 84: 189-204, 2000. We investigated the variability of P-receptor afferent spike trains in the weakly electric fish, Eigenmannia, to repeated presentations of random electric field AMs (RAMs) and quantified its impact on the encoding of time-varying stimuli. A new measure of spike timing jitter was developed using the notion of spike train distances recently introduced by Victor and Purpura. This measure of variability is widely applicable to neuronal responses, irrespective of the type of stimuli used (deterministic vs. random) or the reliability of the recorded spike trains. In our data, the mean spike count and its variance measured in short time windows were poorly correlated with the reliability of P-receptor afferent spike trains, implying that such measures provide unreliable indices of trial-to-trial variability. P-receptor afferent spike trains were considerably less variable than those of Poisson model neurons. The average timing jitter of spikes lay within 1-2 cycles of the electric organ discharge (EOD). At low, but not at high firing rates, the timing jitter was dependent on the cutoff frequency of the stimulus and, to a lesser extent, on its contrast. When spikes were artificially manipulated to increase jitter, information conveyed by P-receptor afferents was degraded only for average jitters considerably larger than those observed experimentally. This suggests that the intrinsic variability of single spike trains lies outside of the range where it might degrade the information conveyed, yet still allows for improvement in coding by averaging across multiple afferent fibers. Our results were summarized in a phenomenological model of P-receptor afferents, incorporating both their linear transfer properties and the variability of their spike trains. This model complements an earlier one proposed by Nelson et al. for P-receptor afferents of Apteronotus. Because of their relatively high precision with respect to the EOD cycle frequency, P-receptor afferent spike trains possess the temporal resolution necessary to support coincidence detection operations at the next stage in the amplitude-coding pathway.




This article has been cited by other articles:


Home page
 J. Neurosci.Home page
M. Rasch, N. K. Logothetis, and G. Kreiman
From Neurons to Circuits: Linear Estimation of Local Field Potentials
J. Neurosci., November 4, 2009; 29(44): 13785 - 13796.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
R. A. DiCaprio, C. P. Billimoria, and B. Ch. Ludwar
Information Rate and Spike-Timing Precision of Proprioceptive Afferents
J Neurophysiol, September 1, 2007; 98(3): 1706 - 1717.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
A.-M. M. Oswald, B. Doiron, and L. Maler
Interval Coding. I. Burst Interspike Intervals as Indicators of Stimulus Intensity
J Neurophysiol, April 1, 2007; 97(4): 2731 - 2743.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
D. Gussin, J. Benda, and L. Maler
Limits of Linear Rate Coding of Dynamic Stimuli by Electroreceptor Afferents
J Neurophysiol, April 1, 2007; 97(4): 2917 - 2929.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurosci.Home page
S. G. Sadeghi, M. J. Chacron, M. C. Taylor, and K. E. Cullen
Neural Variability, Detection Thresholds, and Information Transmission in the Vestibular System
J. Neurosci., January 24, 2007; 27(4): 771 - 781.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurosci.Home page
B. A. Carlson and M. Kawasaki
Ambiguous Encoding of Stimuli by Primary Sensory Afferents Causes a Lack of Independence in the Perception of Multiple Stimulus Attributes
J. Neurosci., September 6, 2006; 26(36): 9173 - 9183.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
M. J. Chacron
Nonlinear Information Processing in a Model Sensory System
J Neurophysiol, May 1, 2006; 95(5): 2933 - 2946.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurosci.Home page
J. Bastian, M. J. Chacron, and L. Maler
Receptive Field Organization Determines Pyramidal Cell Stimulus-Encoding Capability and Spatial Stimulus Selectivity
J. Neurosci., June 1, 2002; 22(11): 4577 - 4590.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurosci.Home page
R. Krahe, G. Kreiman, F. Gabbiani, C. Koch, and W. Metzner
Stimulus Encoding and Feature Extraction by Multiple Sensory Neurons
J. Neurosci., March 15, 2002; 22(6): 2374 - 2382.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
B. Doiron, A. Longtin, R. W. Turner, and L. Maler
Model of Gamma Frequency Burst Discharge Generated by Conditional Backpropagation
J Neurophysiol, October 1, 2001; 86(4): 1523 - 1545.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurosci.Home page
M. J. Chacron, A. Longtin, and L. Maler
Negative Interspike Interval Correlations Increase the Neuronal Capacity for Encoding Time-Dependent Stimuli
J. Neurosci., July 15, 2001; 21(14): 5328 - 5343.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online