In the presence of a constant stimulus the arrival time of a spike has little meaning except in the context of the time of the preceding spike. Electrophysiological studies reveal a surprising degree of variability in neurons firing behaviour which can be described by the probability distribution function of consecutive spikes, the inter-spike intervals (ISI). A histogram (ISIH) can be constructed to represent the ISI-distribution (ISID) of intervals and a probability density function (PDF) of the intervals can be modelled by fitting it to the histogram. The continuous nature of the PDF is attractive since it avoids an arbitrary resolution of spike quantisation.
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Bleeck, S., Winter, I. (2007). A Model of Ventral Cochlear Nucleus Units Based on First Order Intervals. In: Kollmeier, B., et al. Hearing – From Sensory Processing to Perception. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73009-5_4
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DOI: https://doi.org/10.1007/978-3-540-73009-5_4
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