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A chronic implant for recording of cochlear potentials in primates
Author(s) -
Pugh James E.,
Horwitz Milton R.,
Anderson David J.,
Singleton Earl F.
Publication year - 1973
Publication title -
american journal of physical anthropology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.146
H-Index - 119
eISSN - 1096-8644
pISSN - 0002-9483
DOI - 10.1002/ajpa.1330380232
Subject(s) - round window , perilymph , temporal bone , cochlea , primate , cochlear implant , skull , anatomy , ear canal , middle ear , audiology , semicircular canal , inner ear , biomedical engineering , medicine , acoustics , neuroscience , biology , physics , vestibular system
A new technique for the continuous recording of peripheral bioelectrical activity in the auditory system of primates is described. Because of basic differences in the anatomy of the temporal bone, the approach to the round window of the cochlea is more difficult in most primates than in lower animals. A relatively simple surgical approach, which made possible the placement of an electrode into the perilymph of the inner ear via the well‐demarcated horizontal semicircular canal was therefore developed and is described in detail. The bared tip of a Teflon‐coated wire was cemented into the canal opening with carboxylate cement, and the wire attached to a permanent electrical connector on the skull. Cochlear microphonic and action potentials of 50 to 100 μV amplitude were thus recorded on a continuing basis at the same time that behavioral studies of primate auditory acuity were conducted.