13th Annual Conference of the International Speech Communication Association

Portland, OR, USA
September 9-13, 2012

Improving the Entropy Estimate of Neuronal Firings of Modeled Cochlear Nucleus Neurons

Andrea Grigorescu (1), Marek Rudnicki (2), Michael Isik (2), Werner Hemmert (2), Stefano Rini (1)

(1) Institute for Communications Engineering; (2) Institute of Medical Engineering;
Technische Universität München, Munich, Germany

In this correspondence information theoretical tools are used to investigate the statistical properties of modeled cochlear nucleus globular bushy cell spike trains. The firing patterns are obtained from a simulation software that generates sample spike trains from any auditory input. Here we analyze for the first time the responses of globular bushy cells to voiced and unvoiced speech sounds. Classical entropy estimates, such as the direct method, are improved upon by considering a time-varying and time-dependent entropy estimate. With this method we investigated the relationship between the variability of the neuronal response and the frequency content in the auditory signals. The analysis quantifies the temporal precision of the neuronal coding and the memory in the neuronal response.

Full Paper

Bibliographic reference.  Grigorescu, Andrea / Rudnicki, Marek / Isik, Michael / Hemmert, Werner / Rini, Stefano (2012): "Improving the entropy estimate of neuronal firings of modeled cochlear nucleus neurons", In INTERSPEECH-2012, 1452-1455.