Brainstem stroke syndromes are primarily determined by clinical criteria. There are few diagnostic procedures which are of benefit for the evaluation of brainstem ischemic events. Brainstem auditory evoked responses (BAERs) are a new electrophysiologic technique for assessing brainstem function. To evaluate the use of BAERs in patients with brainstem ischemic events, 35 individuals with recent ...

In rodent models, acoustic exposure too modest to elevate hearing thresholds can nonetheless cause auditory nerve fiber deafferentation, interfering with the coding of supra-threshold sound. Low-spontaneous rate nerve fibers, important for encoding acoustic information at supra-threshold levels and in noise, are more susceptible to degeneration than high-spontaneous rate fibers. The change in a...

OBJECTIVE Our aim was to investigate time effects in proinflammatory cytokines and the auditory brainstem response (ABR) thresholds of rat cochlea exposed to noise. MATERIALS AND METHODS Twenty-one rats were divided into two groups: the control group and the noise group. As high as 115 dB sound pressure of white noise was administered to the noise group of 16 rats for 3 h a day for 10 days. T...