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Temporal representations with cochlear implants.

Publication ,  Journal Article
Wilson, BS; Finley, CC; Lawson, DT; Zerbi, M
Published in: The American journal of otology
November 1997

To record and characterize intracochlear evoked potentials (EPs) for a variety of electrical stimuli in studies with cochlear implant patients.Recordings were made with patients having direct percutaneous access to their implanted electrodes. Intracochlear voltages were recorded via unstimulated electrodes. The stimuli included trains of identical pulses, with pulse rates ranging from 100 to 4065/s, and a modulated pulse train produced by a single-channel speech processor, with the pulse rate of 824/s.Magnitudes of EPs for each pulse in trains of identical pulses were uniform for pulse rates below about 200/s. For rates between about 400 and 1000/s, an alternating pattern of EP magnitudes was observed, with relatively large EPs following the odd-numbered pulses. For rates between about 1000 and 3000/s, more complex patterns were observed. After the first millisecond of each train at even higher rates, uniform EPs again were observed across pulses, although the absolute magnitude of the EPs was much lower than that observed for low rates of stimulation. The approximate rates corresponding to boundaries between these different regions varied among subjects and among electrodes within subjects. EP magnitudes for the modulated pulse train reflected the gross periodicity of the modulation waveform but did not reflect temporal details within the periods.Population responses of the human auditory nerve, as indicated by EP magnitudes, reflect the amplitudes of electrical pulses for pulse rates below about 200/s and above about 3000/s. Use of intermediate rates may introduce distortions in the transmission of stimulus information with cochlear implants.

Duke Scholars

Published In

The American journal of otology

ISSN

0192-9763

Publication Date

November 1997

Volume

18

Issue

6 Suppl

Start / End Page

S30 / S34

Related Subject Headings

  • Vestibulocochlear Nerve
  • Time Factors
  • Otorhinolaryngology
  • Humans
  • Evoked Potentials, Auditory
  • Electric Stimulation
  • Deafness
  • Cochlear Implantation
  • 4201 Allied health and rehabilitation science
  • 3202 Clinical sciences
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Wilson, B. S., Finley, C. C., Lawson, D. T., & Zerbi, M. (1997). Temporal representations with cochlear implants. The American Journal of Otology, 18(6 Suppl), S30–S34.
Wilson, B. S., C. C. Finley, D. T. Lawson, and M. Zerbi. “Temporal representations with cochlear implants.The American Journal of Otology 18, no. 6 Suppl (November 1997): S30–34.
Wilson BS, Finley CC, Lawson DT, Zerbi M. Temporal representations with cochlear implants. The American journal of otology. 1997 Nov;18(6 Suppl):S30–4.
Wilson, B. S., et al. “Temporal representations with cochlear implants.The American Journal of Otology, vol. 18, no. 6 Suppl, Nov. 1997, pp. S30–34.
Wilson BS, Finley CC, Lawson DT, Zerbi M. Temporal representations with cochlear implants. The American journal of otology. 1997 Nov;18(6 Suppl):S30–S34.

Published In

The American journal of otology

ISSN

0192-9763

Publication Date

November 1997

Volume

18

Issue

6 Suppl

Start / End Page

S30 / S34

Related Subject Headings

  • Vestibulocochlear Nerve
  • Time Factors
  • Otorhinolaryngology
  • Humans
  • Evoked Potentials, Auditory
  • Electric Stimulation
  • Deafness
  • Cochlear Implantation
  • 4201 Allied health and rehabilitation science
  • 3202 Clinical sciences