Abstract.
We present a method based on information-theoretic distances for measuring the information transfer efficiency of voltage to impulse encoders. In response to light pulses, we simultaneously recorded the EPSP and spiking output of crayfish sustaining fibers. To measure the distance between analog EPSP responses, we developed a membrane noise model that accurately captures stimulus-induced nonstationarities. By comparing the EPSP and spike responses, we found encoding efficiencies on the order of 10−4, with interesting dynamics occurring during initial transients. A simple analog to point-process converter predicted the small information transfer efficiencies and dynamic properties we measured.
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Acknowledgments.
This work was supported by grant MH60861 from the National Institutes of Mental Health and by grant CCR-0105558 from the National Science Foundation. CJR was also supported by a Texas Instruments Fellowship. Figures 2, 3, and 9 are reprinted from Neurocomputing 52–54:53–58, Rozell CJ, Johnson DH, and Glantz RM, “Information processing during transient responses in the crayfish visual system”, Copyright 2003, with permission from Elsevier.
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Rozell, C., Johnson, D. & Glantz, R. Measuring information transfer in the spike generator of crayfish sustaining fibers. Biol. Cybern. 90, 89–97 (2004). https://doi.org/10.1007/s00422-003-0458-y
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DOI: https://doi.org/10.1007/s00422-003-0458-y