Summary: SFB/TRR 31: THE ACTIVE AUDITORY SYSTEM
Precision and adaptation in the auditory midbrain
Nicolas A. Lesica, PhD
University College London
20 May, 2011, 14h c.t.
H 28 / R 2.31 Medical Campus Magdeburg
W2 1-143 University of Oldenburg (video transmission)
Our work is focused on understanding how sound properties are represented in the spike
trains of neurons in the central auditory system. In this talk, I will present results from two
recent studies, the first of which was an attempt to determine the critical timescale for the
precision of spike trains in the inferior colliculus (IC), and the second of which was an
investigation into the effects of changes in sound intensity and location on said precision.
The results demonstrate that IC spike trains carry significant information about incoming
sounds at sub-millisecond precision, and that, for single neurons, this precision is robust to
changes in intensity, but not location. However, the effects of location on spike train
precision average out across the population, so that IC spike trains are robust to changes
in both the intensity and location of sounds at the population level.