| Abstract: | To record the electrocochleogram of conscious guinea pig, the method
of long一termelectrode implantation in the Fallopian canal was used, and normal values of
various index in it weremeasured. When the stimulating freqtiency was 2 kHz tone burst, the
amplitude of cochlear micro-phonic potential was largest,then 0.5,1,4 kHz successively. It was
smallest when the frequency was 8kHz. The polarity of summating potential recorded in the
Fallopian canal was all negative. Summatingpotential一action potential ratio was 0. 084±0.
043 when stimulated by click. Responding threshold ofaction potential(N1)was 2. 6±4. 2 dB
when stimulated by click,and it was 53. 2±5. 4 and 42. 2±7. 3 dB respectively, when
stimulated by0. 5 and l kHz tone burst. Frequency following response(FFR) could be observed
when stimulated by 0.5,1,2, 4 kHz,tone burst;when the stimulating fre-quency was 0. 5 and l
kHz,the amplitude of FFR was larger than that of AP(N1)evoked by samefrequency respectively,
but the responding threshold of FFR was lower than that of AP(N1). |
