Simultaneous Recording and Sequential Recording of EcochG and ABR

Abstract

Sequential recording of Electrocochleography (EcochG) and auditory brainstem response (ABR) on the same time axis were studied in five adults with normal hearing. EcochG was elicited by intratympanic recording. ABR was recorded by vertexmastoid lead. EcochG and ABR were recorded on the separate channels on the data recorder, and sequential recording was performed with off-time recording on Micro Vax II minicomputer.
The results were as follows.
1) Sequential recording of EcochG and ABR provided us the auditory electro-physiological aspects at the level of the inner ear and brainstem. And this technic will able to show us the auditory electro-physiological aspects at the level of the auditory pathway.
2) The sequential recording was possible to indicate the ABR correctly by using the N1 of EcochG instead of wave I of ABR.