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- W2170636417 abstract "Temporal sound cues are essential for sound recognition, pitch, rhythm, and timbre perception, yet how auditory neurons encode such cues is subject of ongoing debate. Rate coding theories propose that temporal sound features are represented by rate tuned modulation filters. However, overwhelming evidence also suggests that precise spike timing is an essential attribute of the neural code. Here we demonstrate that single neurons in the auditory midbrain employ a proportional code in which spike-timing precision and firing reliability covary with the sound envelope cues to provide an efficient representation of the stimulus. Spike-timing precision varied systematically with the timescale and shape of the sound envelope and yet was largely independent of the sound modulation frequency, a prominent cue for pitch. In contrast, spike-count reliability was strongly affected by the modulation frequency. Spike-timing precision extends from sub-millisecond for brief transient sounds up to tens of milliseconds for sounds with slow-varying envelope. Information theoretic analysis further confirms that spike-timing precision depends strongly on the sound envelope shape, while firing reliability was strongly affected by the sound modulation frequency. Both the information efficiency and total information were limited by the firing reliability and spike-timing precision in a manner that reflected the sound structure. This result supports a temporal coding strategy in the auditory midbrain where proportional changes in spike-timing precision and firing reliability can efficiently signal shape and periodicity temporal cues." @default.
- W2170636417 created "2016-06-24" @default.
- W2170636417 creator A5024701679 @default.
- W2170636417 creator A5050654360 @default.
- W2170636417 date "2013-08-01" @default.
- W2170636417 modified "2023-09-30" @default.
- W2170636417 title "Proportional spike-timing precision and firing reliability underlie efficient temporal processing of periodicity and envelope shape cues" @default.
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- W2170636417 doi "https://doi.org/10.1152/jn.01080.2010" @default.
- W2170636417 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3742986" @default.
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