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[The effects of mono- and bipolar stimulations of the acoustic nerve by a pulse current].

The amplitudes of the EPs during monopolar and bipolar stimulation of the acoustic nerve were analysed in the cat auditory cortex. Increasing number of trains of 0.2 and 0.5 msec duration of short (5 mu sec) electric pulses were delivered to the streptomycin-damaged cochlea. The comparison of the two types of stimulation revealed a larger dynamic range and a higher increase in the amplitude at the bipolar stimulation. The average value of the stimulation current was lower for the monopolar stimulation.