SMRTR Science & EngineeringMay 17, 2026Live Science

Why aren't brain transplants possible?

SMRTR summary

Brain transplants remain impossible today because surgeons cannot get severed spinal cord nerves to communicate after reconnection, and the brain's billions of complex neural connections are far beyond current medical capability. Past animal experiments and one controversial human cadaver attempt all failed. However, stem cell therapies and lab-grown brain tissue called organoids show early promise for repairing damaged brain regions, though none are FDA-approved yet.

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