Crossed aphasia in a right-handed bilingual Chinese man: a second case

Area of Science:

• Neuroscience
• Neurology
• Linguistics

Background:

• Crossed aphasia, typically associated with left-hemisphere lesions, is rare in right-handed individuals.
• The relationship between language, cerebral lateralization, and handedness is complex.
• Ideographic writing systems may influence brain organization for language.

Observation:

• A 74-year-old right-handed Chinese man developed persistent nonfluent aphasia after a right cerebral infarction.
• Computerized axial tomography (CAT) scans identified the lesion in the right frontal lobe.
• This presentation mirrors a prior case of crossed aphasia in a bilingual, right-handed Chinese individual.

Findings:

• Two independent cases of crossed aphasia in right-handed Chinese individuals with right-hemisphere lesions have been documented.
• Preliminary studies in Chinese populations have not yet shown a higher incidence of crossed aphasia.
• The potential link between learning an ideographic language and unusual cerebral organization for language requires further investigation.

Implications:

• This case contributes to the understanding of atypical language representation in the brain.
• Further research is warranted to explore the neurobiological underpinnings of crossed aphasia.
• Investigating diverse linguistic and cultural backgrounds can illuminate variations in brain-language relationships.