Changes in guinea pig cochlea after transient cochlear ischemia

Chia Der Lin, I. Hua Wei, Mang Hung Tsai, Ming Ching Kao, Chih Ho Lai, Chuan Jen Hsu, Takeshi Oshima, Ming Hsui Tsai

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Perturbation of cochlear microcirculation, that is, ischemia is a major cause of hearing impairment. Earlier studies examined the short-term (≤7 days) effect of cochlear ischemia. This study characterized the long-term (4 weeks) functional and morphological changes in adult guinea pig cochleae subject to transient ischemia by clamping the labyrinthine artery for 0.25-3 h. Notably, cochlear ischemia for over 1 h caused an increase of auditory brainstem response thresholds and loss of high-frequency hearing, basal-turn hair cells, and spiral ganglions. Auditory recovery may be possible after 30-min ischemia. The extent of the functional and morphological changes depended on the ischemia period, and the changes progressed in extent from the apical to the basal turn in an orderly fashion.

Original languageEnglish
Pages (from-to)968-975
Number of pages8
JournalNeuroReport
Volume21
Issue number15
DOIs
Publication statusPublished - 2010 Oct 27

Keywords

  • auditory brainstem response
  • cochlea
  • guinea pig
  • transient ischemia

ASJC Scopus subject areas

  • Neuroscience(all)

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