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A case of cortical deafness
Clinical and Experimental Neurology
|January 1, 1981
Summary
Cortical deafness and auditory agnosia resulted from bilateral temporo-parietal infarction. Hearing and cortical auditory evoked responses partially returned over one year, indicating potential for neural recovery.
Area of Science:
- Neuroscience
- Audiology
- Neurology
Background:
- Cortical deafness is a rare auditory disorder resulting from damage to the auditory cortex.
- Bilateral temporo-parietal lesions can lead to complex auditory processing deficits.
Observation:
- A 70-year-old man presented with cortical deafness and mild dysphasia following bilateral temporo-parietal infarction.
- Initial presentation included absent cortical auditory evoked responses (CAERs) despite intact brainstem auditory evoked responses (BAERs).
Findings:
- The patient developed a complex cortical hearing disorder with decreased auditory acuity and auditory agnosia.
- Over one year, partial hearing recovery was observed, with a return of CAERs.
- Persistent mild hearing loss, impaired speech discrimination, and inability to recognize music were noted after one year.
Implications:
- This case highlights the potential for partial recovery of auditory function and neural pathways after significant brain injury.
- Understanding the progression of cortical auditory disorders is crucial for diagnosis and rehabilitation.
- The findings contribute to the understanding of auditory processing in the temporal and parietal lobes.