The nerve’s two latency components reflect neurons firing twice, not two fiber populations

Evidence

In most cases a2 /a1 is significant, in both guinea pigs and humans. This suggests either two subpopulations of fibres and/or neural elements (peripheral vs. central site of excitation) with different latencies and proportions, or repeated firings of the same neurons. The latter option is supported by the following arguments (see also in Ramekers et al. 2015 ). First, the interval between the two components, μ2 –μ1 , is about 0.5 ms, which is around the absolute refractory period estimated from masker-probe responses. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2442

Categorization

• XREF: Relates to the recovery/masker-probe response measures also discussed in the Frankfurt School materials on physiological measurement methods, though thematically to auditory physiology more broadly.