Correlation of acoustic threshold measures and spiral ganglion cell survival in severe to profound sensorineural hearing loss: Implications for cochlear implantation


Incesulu A. , Nadol J.

ANNALS OF OTOLOGY RHINOLOGY AND LARYNGOLOGY, vol.107, no.11, pp.906-911, 1998 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 107 Issue: 11
  • Publication Date: 1998
  • Doi Number: 10.1177/000348949810701102
  • Title of Journal : ANNALS OF OTOLOGY RHINOLOGY AND LARYNGOLOGY
  • Page Numbers: pp.906-911

Abstract

In a temporal bone study of 26 ears from 13 patients who, in life, had severe sensorineural hearing loss, the segmental and total spiral ganglion cell (SGC) counts were correlated with hearing thresholds and with the difference between hearing thresholds in the two ears, the age at death, the duration of deafness, and the duration of hearing loss. A statistically significant correlation was found between the interaural differences in total SGC counts and the interaural difference in pure tone averages for 3, 4, and 5 frequencies. The total SGC count was higher in the ear with the better residual hearing in 11 of 12 cases. Approximately 41% of the variability in interaural difference in pure tone average was explained by the difference in SGC counts. The findings would suggest that in a given individual, selection of the ear with better residual hearing for cochlear implantation is likely to result in accessing a higher number of residual SGCs. This, in turn, may result in better speech recognition with the implant.