The Analysis of Fast and Slow Components of Auditory Brainstem Response

Abstract

Auditory brainstem response (ABR) was divided into the fast and slow components by computerized digital filter.
Digital filtered signals were averaged up to 1000 times. During these procedures, every 100 times' averaged responses were recorded successively, and their latencies and detectability were calculated, in order to compare the modality of the fast and slow components of ABR.
In this study, effect of stimulus rise time and duration on two components of ABR were investigated.
The results were as follows;
(1) The stability of wave I to wave IV was decreased both with increase in stimulus rise time and increase in duration. The stability of both wave V and the slow component, on the other hand, was not decreased with rise time and duration.
(2) The latencies of the fast components were prolonged with increase in stimulus rise time and duration. The latency of the slow component, on the other hand, showed no remarkable change with increase in stimulus rise time and duration.