BRAIN-STEM AUDITORY-EVOKED POTENTIALS IN HORSES AND PONIES

Brainstem auditory evoked potentials (BAEPs) were recorded from 27 pon ies. The peak and inter-peak (IP) latencies, V:I ratios and dispersal values were determined and the results from each category were compare d with each other and with the authors' Thoroughbred BAEP data. Peak l atencies were faster for ponies. The V:I ratios and dispersal values h ad similar characteristics in horses and ponies. In ponies there was a strong trend for IP latencies to be positively correlated with height , inter-aural distance and age. A positive relationship between I-V IP latency and inter-aural distance was confirmed in ponies as well as h orses.