Crossed aphasia in a Chinese bilingual dextral

Area of Science:

• Neuroscience
• Linguistics
• Neurolinguistics

Background:

• Aphasia is a language disorder resulting from brain damage.
• Right hemisphere lesions can cause aphasia, challenging traditional left-hemisphere language models.

Observation:

• A 54-year-old Chinese man developed nonfluent aphasia after a right cerebral infarction.
• Computed tomography identified the lesion in the right middle cerebral artery territory.
• Language deficits were more severe in Chinese than English.

Findings:

• The patient's early education and primary language was Chinese.
• Despite early Chinese immersion, English performance was less affected.
• This suggests a potential role for the ideographic nature of Chinese in right-hemisphere language lateralization.

Implications:

• Early learning of visually-based languages like Chinese may contribute to right-hemisphere language dominance.
• This case highlights the neuroplasticity of language processing and the influence of linguistic structure on brain lateralization.
• Further research is needed to explore the impact of different writing systems on language networks.