Neural degeneration does not increase polarity sensitivity following deafening

Evidence

If neural degeneration had an effect on polarity sensitivity, we would expect the polarity effect to increase over time and to reach positive values when fibers are degenerated. This does not seem to be the case as the level difference between polarities rather tends to decrease right after deafening for several subjects and then to remain roughly constant. … Although the polarity effect is opposite in sign for the two species, it is interesting to note that its magnitude is similar for RPS and for TRI. For RPS-IPG, the smaller effect obtained psychophysically may be due to the fact that the delayed long, low-amplitude phase contributed to perception whereas it did not contribute to the neural responses recorded here. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2311

Categorization

• corroborated: 2 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 2311
• XREF: connects to: Neural degeneration over time does not flip cathodic-anodic stimulation efficiency in deafened guinea pigs; Neural degeneration does not drive the anodic sensitivity seen in humans — Dijk, Pim van, Physiology, Psychoacoustics and…, 2272; Species differences in final nerve geometry may drive the polarity reversal (+5 more)

Broader Connections

• Neural degeneration alone does not explain polarity sensitivity differences in cochlear implants #corroborates (0.95) — Dijk, Pim van, Physiology, Psychoacoustics and…, 2309