TY - JOUR
T1 - Comparison of earlobe and promontorium recording sites in electrocochleography
AU - Cohen, D.
AU - Sohmer, H.
PY - 1977
Y1 - 1977
N2 - The compound cochlear action potential can be recorded in man from the promontorium, after perforation of the tympanic membrane. This same cochlear action potential (along with the responses of the brain stem auditory nuclei) can also be recorded by means of earlobe-vertex electrodes. Recordings were made in patients with chronic perforations of the tympanic membrane from the promontorium and simultaneously from the earlobe (-vertex) in order to see if there is a difference in response threshold. As click intensity was decreased, the responses disappeared in both recordings at about the same stimulus intensity (threshold). At near-threshold click intensities, the response seen in the promontorium recording was the compound cochlear action potential while in the earlobe vertex recording, the response often seen was that from the inferior colliculus. Thus, in most cases, there is no real advantage to be gained by perforating the tympanic membrane in order to record from the promontorium since an identical response threshold can be obtained using surface electrodes.
AB - The compound cochlear action potential can be recorded in man from the promontorium, after perforation of the tympanic membrane. This same cochlear action potential (along with the responses of the brain stem auditory nuclei) can also be recorded by means of earlobe-vertex electrodes. Recordings were made in patients with chronic perforations of the tympanic membrane from the promontorium and simultaneously from the earlobe (-vertex) in order to see if there is a difference in response threshold. As click intensity was decreased, the responses disappeared in both recordings at about the same stimulus intensity (threshold). At near-threshold click intensities, the response seen in the promontorium recording was the compound cochlear action potential while in the earlobe vertex recording, the response often seen was that from the inferior colliculus. Thus, in most cases, there is no real advantage to be gained by perforating the tympanic membrane in order to record from the promontorium since an identical response threshold can be obtained using surface electrodes.
KW - Auditory nerve
KW - Brain stem
KW - Earlobe
KW - Electrocochleography
KW - Promontorium
KW - Response threshold
UR - http://www.scopus.com/inward/record.url?scp=0017649637&partnerID=8YFLogxK
U2 - 10.3109/00206097709080017
DO - 10.3109/00206097709080017
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C2 - 921604
AN - SCOPUS:0017649637
SN - 1499-2027
VL - 16
SP - 462
EP - 468
JO - International Journal of Audiology
JF - International Journal of Audiology
IS - 6
ER -