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[Crossed aphasia in a right-handed patient]
V Delreux1, M P de Partz, L Kevers
1Service de Neurologie, Clinique Saint-Jean, Bruxelles.
Revue Neurologique
|January 1, 1989
Summary
This case study suggests the right hemisphere can control speech in right-handed individuals with crossed aphasia. Further research is needed as crossed aphasia cases show varied underlying mechanisms.
Area of Science:
- Neuroscience
- Neurolinguistics
- Clinical Neurology
Background:
- Crossed aphasia is a rare condition where language deficits occur due to a lesion in the hemisphere typically not dominant for speech.
- Right-handed individuals usually exhibit left-hemisphere dominance for language functions.
Observation:
- A right-handed patient presented with crossed aphasia, indicating potential right-hemisphere speech dominance.
- Amytal injection into the left carotid artery did not exacerbate language deficits.
Findings:
- This case provides evidence for right-hemisphere cerebral dominance for speech in a subset of right-handed patients.
- The findings challenge a singular physiopathological model for all crossed aphasia cases in right-handed individuals.
Implications:
- Suggests plasticity and variability in hemispheric language representation.
- Highlights the need for individualized assessment in diagnosing and treating aphasia.
- Contributes to understanding the neurobiology of language and cerebral lateralization.