Phantom limbs: amputees still feel limbs that are gone
Most people who lose a limb still feel it vividly, sometimes painfully, because the body you sense lives in your brain, not your flesh.
After an amputation, the limb is gone, but for most people the feeling of it isn’t. They report a hand they can still clench, an itch on a missing finger, fingers curling into a fist, and very often pain in flesh that no longer exists. These are phantom limbs, and they are the rule, not the exception.
A systematic review in the European Journal of Pain found a lifetime prevalence of about 87% for phantom limb sensations, with phantom limb pain reported by roughly 76% to 87% of amputees. The phantom isn’t a fading echo, either; the sensations can persist for decades.
The reason is that your body image is built and stored in the brain. The somatosensory cortex carries a detailed map of the body, and when the limb’s nerve signals stop arriving, that map doesn’t simply erase the missing part. Studies of long-term amputees show the brain’s representation of a lost hand is preserved and reorganizes rather than vanishing, even an average of 18 years later.
Lose the hand, and the map of the hand stays behind.
This is why neurologist V. S. Ramachandran’s mirror box can ease phantom pain: by showing the brain a reflected, intact limb, it feeds the persistent body-map the visual evidence it’s been missing. The phantom is proof that the self you inhabit is, fundamentally, a construction of the mind.
Sources & references
2 referencesWell-established. Corroborated by 2 independent sources.
