Max Planck Institute for Dynamics and Self-Organization -- Department for Nonlinear Dynamics and Network Dynamics Group
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BCCN/BFNT AG-Seminar

Friday, 03.07.2015 14 c.t.

Firing patterns in the auditory nerve

by Prof. Dr. Frank Rattay
from Institute for Analysis and Scientific Computing, Vienna University of Technology, Vienna, Austria

Contact person: Mantas Gabrielaitis

Location

MPI DS seminar room (0.77/0.79)

Abstract

Acoustical signals are represented in the auditory nerve both by place-rate information and by the fine structure of the time differences in the firing pattern. A third mechanism supports low energy signals and makes them audible using amplification by the Brownian motion of hair cell stereocilia. The theory shows that the possible recognition of this fine structure depends in a quadratic way on the number of the spiking elements, that is, the number of active afferent auditory nerve fibers. The number of firing elements seems to be of higher importance for speech understanding than a sharp tuning of frequency. The capture effects of neighbored characteristic frequencies enlarge the auditory nerve pattern. Furthermore, firing patterns of the electrically stimulated cochlea will be discussed.

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