In the brain, a lost limb is never really gone
Summary
A new study suggests that the human brain does not significantly change its body map after an amputation, as was previously thought. Brain scans of individuals with arm amputations showed that the brain's representation of the missing limb remains unchanged even years later. This finding could help improve technologies like brain-computer interfaces for prosthetic limbs.Key Facts
- The study challenges past research suggesting the brain dramatically reorganizes after limb loss.
- Emily Wheldon, an amputee, still feels her missing arm is present, a phenomenon known as a phantom limb.
- Brain scans revealed that the brain's map of a missing hand remains similar to its map before amputation.
- The research involved three people who had amputations due to diseases like cancer.
- Scans were conducted before and after amputation, showing no significant change in brain maps.
- Previous studies made different conclusions by comparing amputees to people without amputations, not studying changes in the same individuals.
- The findings might assist in developing better prosthetics controlled by brain interfaces that rely on stable brain circuits.
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