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J Korean Neurol Assoc. 1987 Dec;5(2):181-189. Korean. Original Article.
Park YC , Lee DK .
Department of Neurology, Keimyung University School of Medicine.

This study was done in order to obtain normal data and normal wave form variations of brainstem auditory evoked potential (BAEP) on various click stimulations of intensities of intensities and frequencies. Observations were made on 50 normal Korean volunteers (32 males and 18 females) ranging in age from 8 to 56 years. Silver disc electrodes 7mm in diameter were placed over the right and left ear lobes and vertex. Earphone rarefaction click stimulations were given with 10 click/sec 70 dB, 50 click/sec 70 dB and 10 click/sec 50 dB, and contralateral 40 dB masking noise. Using Medelec Sensor, input from recording electrode was led to differential amplifiers and the output was summated by average system and then recorded by X-Y plotter. Analysis time, low filter and high filter are adjusted to 10 msec, 100 Hz and 3,000 Hz, respectively, and 2,048 responses were summated. Normal data on various click stimulations and wave form variations of BAEPs were obtained. Increased intensity of click stimulation produced decreased latency and increased amplitude of each BAEP more discrete BAEP waves cound be obtained at 10 click/sec 70 dB than other type of stimulations. Absolute latency of each BAEP wave and interpeak latency were not significantly different from those of the normal data of the other laboratories.

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