Across-fibre latency spread, not single-fibre shape, dominates the recorded compound response
Evidence
However, the distribution of response latencies between fibres may be Gaussian. Therefore, we tested fits of CDLDs with gamma functions and with Gaussian functions, and both in guinea pigs and humans we observed superior fits with Gaussian functions. Due to the large population size and assuming that the discharge jitter is smaller within than between fibres, the resulting convolution of the gamma function with the Gaussian distribution could explain the Gaussian-like CDLD. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2435
Categorization
Category: Causal Relationships
- DEFINE: Explains why a compound neural response looks Gaussian even when each fibre’s discharge is gamma-shaped.
Related
- Inter-fibre latency variation across fibres is Gaussian despite single-fibre responses being gamma-shaped (similarity 0.93)
- Electrically evoked auditory nerve responses fit Gaussian rather than gamma latency distributions (similarity 0.88)
- Many-fibre population responses become Gaussian despite single-fibre gamma firing patterns (similarity 0.86)
- A compound action potential equals single-fibre waveform convolved with spike latency distribution (similarity 0.83)
- A compound neural response equals single-fiber waveforms convolved with the discharge timing distribution (similarity 0.80)
- Population latency distributions become Gaussian after convolution across many fibres (similarity 0.78)
Broader Connections
- Population latency distributions become Gaussian after convolution across many fibres
#expands(0.78) — Dijk, Pim van, Physiology, Psychoacoustics and…, 2382 - Deconvolution of compound responses reveals two firing components invisible in raw waveforms
#complicates(0.75) — Dijk, Pim van, Physiology, Psychoacoustics and…, 2445 - Groups of nerves firing in staggered cycles code frequencies above 300 Hz
#corroborates(0.72) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 900