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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Toluene ototoxicity in rats: assessment of the frequency of hearing deficit by electrocochleography.

To identify the frequency range most sensitive to toluene-induced auditory damage, the auditory function of adult Long-Evans rats exposed to 1750 ppm of toluene (6 h/day, 5 days/week, 4 weeks), was tested by recording auditory-evoked potentials directly from the round window of the cochlea. The present electrocochleographic findings do not support a specific mid- to high-frequency loss of auditory sensitivity. On the contrary, the electrophysiologic data, obtained for audiometric frequencies ranging from 2 to 32 kHz, showed a hearing deficit not only in the mid-frequency region (12-16 kHz), but also in the mid-low-frequency region (3-4 kHz). Actually, the effect of toluene was independent of the frequency in our experimental conditions. Histological analysis was consistent with electrophysiologic data because a broad loss of outer hair cells occurred in both mid- and mid-apical coil of the organ of Corti.[1]


  1. Toluene ototoxicity in rats: assessment of the frequency of hearing deficit by electrocochleography. Lataye, R., Campo, P., Loquet, G. Neurotoxicology and teratology. (1999) [Pubmed]
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