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News
Brain aging patterns in the undamaged hemisphere could hold the key to predicting aphasia recovery after stroke. Researchers found that older-than-expected brain age in the intact right hemisphere was linked to more severe aphasia and poorer response to speech therapy. The findings, published in The Journal of Neuroscience, could pave the way for personalized rehabilitation planning using routine MRI scans.
Stroke size and location don't tell the whole story when it comes to aphasia — the language impairment that often follows a stroke. A new study published in The Journal of Neuroscience suggests that the biological "age" of the brain tissue that wasn't damaged may be just as important for predicting recovery.
Researchers analyzed MRI scans from 188 adults with chronic left-hemisphere stroke and used a freely available online tool to estimate brain age in the intact right hemisphere. They found that accelerated brain aging in that region explained an additional 7% of the variation in aphasia severity — on top of factors like age, lesion size, and lesion location. Older-appearing brain tissue in the medial prefrontal and cerebellar/ventral areas was specifically tied to worse language scores and poorer naming ability.
Key Takeaways:
Why it matters: This research opens the door to using routine MRI scans — no special equipment needed — to better predict who will benefit most from rehabilitation. If the brain-aging signature is linked to modifiable factors like blood pressure or diabetes, it could eventually guide personalized treatment planning for stroke survivors with aphasia.
