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Cortical auditory disorders: clinical and psychoacoustic features
1Department of Neurology, Case Western Reserve University, Cleveland, Ohio.
Journal of Neurology, Neurosurgery, and Psychiatry
|January 1, 1988
Summary
Bilateral cortical auditory lesions can cause a spectrum of auditory processing disorders, including cortical deafness and pure word deafness. These conditions highlight the complex nature of auditory perception and processing in the brain.
Area of Science:
- Neuroscience
- Audiology
- Clinical Neurology
Background:
- Cortical auditory lesions can lead to diverse auditory deficits.
- Understanding the spectrum of these disorders is crucial for diagnosis and treatment.
Observation:
- Two patients with bilateral cortical auditory lesions presented with evolving symptoms.
- Initial cortical deafness progressed to generalized auditory agnosia, amusia, pure word deafness, and temporal sequencing impairments.
Findings:
- Both patients exhibited dysacusis, absent middle latency evoked responses, and errors in sound recognition and matching.
- Psychoacoustic discrimination tasks revealed similarly disturbed performance, indicating shared underlying deficits.
Implications:
- The findings suggest that various clinical syndromes from cortical auditory lesions represent a spectrum of auditory processing disorders.
- Syndrome variations may correlate with the extent of involvement in primary cortical, accessory, and efferent auditory systems.