The response of the human vestibulo-ocular reflex system to a constant angular acceleration is calculated using a second order model with an adaptation term. After first reaching a maximum the peracceleratory response declines. When the stimulus duration is long the decay is mainly governed by the adaptation time constant Ta, which enables to reliably estimate this time constant. In the postacceleratory period of constant velocity there is a reversal in response. The magnitude and the time course of the per- and postacceleratory response are calculated for various values of the cupular time constant T1, the adaptation time constant Ta, and the stimulus duration, thus enabling their influence to be assessed.
A guinea pig model was used to study correlations between cis-platinum dosage and level of hearing loss, hair cell loss in the cochlea. Other parameters measured included weight loss and serum urea, creatinine, and cis-platinum levels. The damage to the inner ear expressed as hearing loss and hair cell loss demonstrated a highly positive correlation with the dosage of cis-platinum, and only a moderately positive correlation with the cis-platinum serum levels. Weight loss correlated well with hearing loss.
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