Article
NRT Double Peaks revisited
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Authors
Published: | May 31, 2005 |
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Outline
Text
Introduction
The standard response waveform of evoked compound action potentials (ECAPs) recorded using Neural Response Telemetry (NRT) Recordings is characterized by a negative peak followed by a smaller positive peak. In a small but significant number of cases, however, the response waveform shows a double peak structure
Materials and Methods
One proposed model [Ref. 1] attributes the two peaks to the presence of surviving dendritic structures. The origin of the two peaks has been questioned in that the double peak structure could be merely an artifact.
Results
The new CIC4 research implant from Nucleus allows higher resolution recordings of the ECAP without having to resort to multiple data buffers, and also features several novel stimulus artifact cancellation/reduction techniques which do not depend on forward masking. Neural response recordings with double peaks have also been obtained with the CIC4 implant.
Conclusions
The implications of the results comparing the recordings with the current CIC3 (CI24M) implant and those with the CIC4 implant will be discussed.
References
- 1.
- Lai WK, Dillier N. A simple two-component model of the electrically evoked compound action potential in the human cochlea. Audiology & Neurootology, 2000; 5: 333-345.