Akustisch evozierte Potentiale (AEP) im Kindesalter bei periodischen und zufallsverteilten Reizintervallen

Abstract

The differences between amplitudes and latencies of acoustically evoked potentials (AEP) in children, aged between 3 and 7 years, were tested using random distributed stimuli with mean interstimulus intervals (ISI) of 1.45 sec, 2.1 sec, and 4.1 sec and periodic stimuli with the same ISI. We applied three different intensities, 30, 50, and 70 dB SPL and a frequency of 1000 c/s. We determined the peak to peak amplitudes P2N2 and N2P3 and the latencies of P2, N2, and P3 for our calculation because of the typical AEP pattern in children. There were no significant differences between the mean amplitudes and mean latencies, using an error probability of 1% comparing the AEP determined by the two different ways of stimulation. The increase of the ISI from 1.45 to 4.1 sec didn't yield to a significant improvement of the AEP in both stimulation patterns. In the tested group of children the used stimulation pattern, as we already stated in adults, is without greater importance.