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Stroke-Associated Cortical Deafness: A Systematic Review of Clinical and Radiological Characteristics
Gracinda Silva1, Rita Gonçalves2, Isabel Taveira3
1Faculty of Medicine and Biomedical Sciences, Campus de Gambelas, University of Algarve, 8005-139 Faro, Portugal.
Brain Sciences
|November 27, 2021
Summary
Stroke-associated cortical deafness (CD) is a severe hearing impairment resulting from brain lesions. Recovery is more likely with subcortical lesions, while cortical lesions often lead to persistent communication difficulties.
Area of Science:
- Neurology
- Otolaryngology
- Radiology
Background:
- Stroke is the primary cause of cortical deafness (CD), a severe form of central hearing impairment.
- Cortical deafness remains poorly understood and potentially underdiagnosed.
- This systematic review details the clinical and radiological characteristics of stroke-associated CD.
Purpose of the Study:
- To systematically review and characterize the clinical and radiological features of stroke-associated cortical deafness.
- To identify lesion locations and their impact on auditory function and recovery.
Main Methods:
- Systematic literature search of PubMed and Web of Science databases up to June 30, 2021.
- Utilized MeSH terms including "deafness" and "stroke", "hearing loss" and "stroke", and "auditory agnosia" and "stroke".
Main Results:
- Identified 46 cases of stroke-associated CD.
- Bilateral lesions in the superior temporal or Heschl's gyri were most common (81%).
- Subcortical hemispheric (13.51%) and brainstem (0.05%) lesions were also identified. Sensorineural hearing loss was universal. Clinical improvement occurred in 20%, with full conversational recovery limited to subcortical lesions.
Conclusions:
- Stroke-associated CD is a rare but severe condition resulting from combined cortical and subcortical central auditory pathway lesions.
- Functional hearing recovery is primarily associated with subcortical lesions.
- Accurate diagnosis is crucial, as misdiagnosis with peripheral or psychiatric disorders can occur.
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