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Performance intensity functions in cochlear and eighth nerve disorders.

F H Bess, A F Josey, L E Humes

The American Journal of Otology

|July 1, 1979

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Performance intensity functions for monosyllabic materials (PI-PB) reveal distinct word recognition patterns. Eighth nerve pathology shows a "rollover effect," unlike cochlear disorders, highlighting PI-PB

Area of Science:

Audiology
Neuroscience
Speech-Language Pathology

Background:

Eighth nerve pathology and Meniere's disease impact auditory processing.
Distinguishing between cochlear and retrocochlear hearing loss is clinically significant.

Purpose of the Study:

To investigate the utility of performance intensity functions for monosyllabic materials (PI-PB) in differentiating auditory pathologies.
To characterize word recognition performance in patients with eighth nerve pathology and Meniere's disease.

Main Methods:

PI-PB functions were measured in 20 patients with eighth nerve pathology and 15 with Meniere's disease.
Word recognition scores were assessed across varying speech intensities.

Main Results:

Related Experiment Videos

Patients with retrocochlear involvement (eighth nerve pathology) demonstrated a significant decline in word recognition as intensity increased beyond optimal levels.
This pronounced deterioration, termed the "rollover effect," was not observed in individuals with cochlear disorders (Meniere's disease).

Conclusions:

The PI-PB function is a valuable diagnostic tool for identifying retrocochlear auditory dysfunction.
This test aids in distinguishing eighth nerve pathology from cochlear disorders based on speech recognition patterns.