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April 1970

Long-Term Partial Eighth Nerve Section in Cats: Effect on Auditory Discrimination

Author Affiliations

Beirut, Lebanon; Baltimore
From the Department of Otolaryngology, American University of Beirut, School of Medicine, Beirut, Lebanon (Dr. Mikaelian) and the Division of Otolaryngology, the Johns Hopkins University School of Medicine, Baltimore (Dr. Warfield).

Arch Otolaryngol. 1970;91(4):371-375. doi:10.1001/archotol.1970.00770040529013

Five cats were trained to discriminate auditory tonal patterns, following which a partial section of the eighth nerve was made involving 50% of the auditory fibers. After section the animals maintained their pure-tone thresholds and retained the response to tonal patterns. The present experiment suggests that in peripheral disorders of hearing with normal or near normal pure-tone audiograms and poor discrimination, the discrepancy does not arise from reduced input of information to the central nervous system as a result of reduced auditory fibers.