A regular spiking neuron (sustained chopper) that exhibits accurate identification of envelope frequency from its spike trains. Top left: peristimulus time histogram of the response to a pure tone at the characteristic frequency of the neuron. Bottom left: Spike train classifier decisions represented as a confusion matrix. Warm colors along the diagonal indicate a large proportion of individual spike trains were assigned to the correct modulation frequency. Right: Raster plots of the responses to amplitude-modulated tones, for several modulation frequencies (stimulus waveforms displayed above each panel). The number of spikes in each stimulus period decreases as the modulation frequency is increased.
Slow amplitude fluctuations in sounds, critical for #SpeechRecognition, seem poorly represented in the #brainstem. This study shows that overlooked intricacies of #SpikeTiming represent these fluctuations, reconciling low-level neural processing with #perception @plosbiology.org 🧪 plos.io/3FJ4adI