Berlin 2024 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 31: Poster: Statistical Physics
DY 31.19: Poster
Mittwoch, 20. März 2024, 15:00–18:00, Poster C
Effect of burst packages on coding by primary sensory afferents in weakly electric fish — •Maria Schlungbaum1,2, Alexandra Barayeu3,4, Jan Grewe3,4, Jan Benda3,4, and Benjamin Lindner1,2 — 1Physics Department, Humboldt University Berlin — 2Bernstein Center for Computational Neuroscience Berlin — 3Institute for Neurobiology, Eberhard Karls Universität Tübingen — 4Bernstein Center for Computational Neuroscience Tübingen
How burst spikes influence the coding of time-dependent signals is not well understood. We study the impact of burst packages on the output statistics of sensory neurons, namely the first- and second-order response functions, the spike train power spectrum, and the coherence function. Burst packages modulate these response functions in a frequency-dependent manner; they can have either an increasing or diminishing effect (low frequencies) or no effect at all (large frequencies) on all these statistics. In particular, we demonstrate that bursting can boost the nonlinear response in certain frequency regions. Assuming a random number of burst spikes endowed with a temporal jitter, we calculate theoretical formulas for the spectral statistics. In this framework, we do not take stimulus-driven effects on bursting into account. We compare our analytical results to spike train data from P-unit electroreceptors of the electric fish Apteronotus leptorhynchus and inspect how well our theoretical results can describe the differences between coding with and without burst spikes in these cells.
Keywords: bursting; response statistics; weakly electric fish