Archives of Otolaryngology - Head and Neck Surgery · 1971 · 120 citations · 12 references
Health ProfessionsAudiologySpeech-language PathologyCommunication DisordersHearing AssessmentHearing ScienceAuditory PhoneticsCochlear DisordersCochlear FunctionCochlear NeuroscienceHearing ImpairmentHearing LossCochlear Function AssessmentCochlear Function TestingDifferential Diagnosis CriteriaDifferential Symptom DiagnosisRetrocochlear Pathology
Performance-Intensity (PI) functions for phonetically balanced (PB) words were compared in 41 patients with presumably cochlear disorder and 16 patients with retrocochlear disorder. The PI functions of all of 10 eighth nerve disorders and three of six brain stem disorders showed a pronounced rollover phenomenon. After reaching a maximum the PI function declined substantially with further increase in speech level. Implications of the phenomenon for differential diagnosis of cochlear and retrocochlear disorders are discussed.
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