Abstract
A microcomputer-based system for the recording and analysis of the auditory evoked potentials (AEPs) was developed. A software system consists of three parts. (1) Measurement of the AEPs : By the use of the A/D converter with DMA interface and the D/A converter with internal clock, the AEPs are recorded while acoustic stimuli are being presented. The AEPs are averaged in realtime and the waveform is displayed on the CRT with every presentation of acoustic stimuli. (2) Off-line data analysis : One can measure the values of response amplitude and latency at two vertical cursors on the averaged AEP waveform which is displayed on the CRT. A waveform difference between two averaged AEP waveforms is calculated and listed to a file. (3) Topographic disply : Interpolation is carried out by means of the two-variable sampling function. The interpolated values are quantized to 11 levels. The potential distributions are graphically displayed on the CRT. We have confirmed that the system is useful in the analysis of the AEPs of the Mynah bird.
