Functional reorganization of the contralesional precentral gyrus following acute subcortical ischemic stroke and its association with gene expression profile.

Only 22 of the 34 patients had the 3-month scan, and the authors describe the findings as preliminary and needing confirmation in larger independent groups. Everyone received routine care and the amount of physiotherapy each patient received was not recorded, so the brain changes could reflect spontaneous recovery, the therapy, or both, and the study cannot separate them. The brain changes and the score changes were measured over the same period, so nothing here shows which came first. Rising activity may support recovery, or may simply be what recovering tissue looks like. The gene data come from six deceased donors without brain disease, not from the patients themselves, and cover only the left hemisphere. Donor age, sex and genetic background differ from the patients', and the analysis is correlational, not causal. Follow-up stopped at 3 months, so nothing is known about recovery beyond the subacute phase. Every patient had a stroke on the right side below the cortex, so these findings may not hold for strokes in other locations.

The work was funded by the National Natural Science Foundation of China, a government research funder. The supplied text names no other funder and contains no competing-interest declaration.

All 22 patients received routine care only, so nothing here tests any treatment. Do not read the link between rising activity in the unaffected hemisphere and better motor scores as evidence that stimulating that region helps or that suppressing it harms. The study measured what happened alongside recovery and cannot show which came first.