Evoked potential (EP) O-EV001. The effect of watching movies on BAEP

Abstract

Introduction . Previous researches on peripheral filtering at the cochlear and brainstem levels toward auditory information by using BAEP measurement had been conducted. However, the results were still varied. This study was aimed to find out the effect of selective visual attention of watching movies towards the latency and amplitude of BAEP. Methods . This study involved 12 healthy subjects (9 males, 3 females) with right-ear dominance. The age of samples ranged from 21-52 years old, and the mean was 30.7 years. BAEP measurement was done in two conditions, eyes were closed and watching a silent action movie in 14 inches monitor with a view distance of 75 cm. Every subject was recorded two times for reproducibility using 4 Ag-Cl electrodes (Cz, Fz, A1, and A2) that were placed according to the International Electrode (10–20) Placement system. The stimulus was monoaural click-sound at the right ear with the intensity of 70 dB nHL, while noise-masking was given to the left ear. The measurements of latency and amplitude of wave I, wave V and interval peak latency of wave I-V were done. Results . This study showed that there were significant latency delay of wave I as much as. 0.068 ms or 3.81% (p = 0.006) and a decrease of amplitude as much as 0.043 µV or 26.34% (p = 0.001). But no significant different of latency and amplitude of wave V on two conditions - eyes closed and during watched movie (p > 0.05). The interval peak latency wave I-V of these two groups was not significantly different also with each value [4.022 ± 0.115 ms vs 3.989 ± 0.100 ms (p = 0.241)]. Conclusion . Selective visual attention by watching movies gave an inhibition effect toward the auditory pathway at the cochlear level, but no effect at the brainstem level.