The auditory brainstem response (ABR), a measure of neural synchrony, was used to estimate auditory sensitivity in the eastern screech owl (Megascops asio). The typical screech owl ABR waveform showed two to three prominent peaks occurring within 5 ms of stimulus onset. As sound pressure levels increased, the ABR peak amplitude increased and latency decreased. With an increasing stimulus presen...

Numerous fish species produce broad-band pulsed sounds with a distinct temporal patterning which is thought to be important during intraspecific communication. In order to determine whether fishes are able to utilize temporal characteristics of acoustic signals, time resolution was determined in four species of otophysines and anabantoids by analyzing auditory brainstem responses (ABRs) to doub...

The matched filter hypothesis proposes that the tuning of auditory sensitivity and the spectral character of calls will match in order to maximize auditory processing efficiency during courtship. In this study, we analyzed the acoustic structure of male calls and both male and female hearing sensitivities in the little torrent frog (Amolops torrentis), an anuran species who transmits acoustic s...

This study investigated the possibility of a correlate of the masking level difference (MLD) in the auditory brainstem response (ABR), given that behavioral data indicate the brainstem origination of the MLD. Previous studies have reported MLD characteristics in the late auditory evoked potentials. In the present study, stimuli were presented in S(o)N(o) and S pi N(o) to female adults with norm...

objective(s): noise-induced hearing loss (nihl) is the major cause of acquired hearing loss.  celecoxib, a cyclooxygenase-2 (cox-2) inhibitor, is a non- steroidal anti- inflammatory drug (nsaid) with known antioxidant and antineoplastic activity. therefore, we monitored the extent of temporary noise- induced threshold shifts (tts) and cochlear damage caused by high level 4- khz noise exposure t...

Experience has a profound influence on how sound is processed in the brain. Yet little is known about how enriched experiences interact with developmental processes to shape neural processing of sound. We examine this question as part of a large cross-sectional study of auditory brainstem development involving more than 700 participants, 213 of whom were classified as musicians. We hypothesized...

A previous study has shown a high incidence of abnormal auditory brainstem responses in alcoholics, particularly when cerebral and/or cerebellar atrophy was present in CT scans. To correlate the electrophysiological findings with definable morphological alterations, quantitative measurements of the brainstem structures in CT scans were made. To determine the relative size of the brainstem, the ...