
The Brain’s Map
To grasp the complexities of phantom limb pain, we must delve into the concept of “cortical remapping.” Imagine your brain as a map where it stores information about different parts of your body. When you learn something new or practice a skill, like playing the piano or riding a bike, your brain changes a little bit. Cortical remapping is when your brain redraws parts of that map to make room for new things you’re learning or doing.
This reorganization could lead to the sensation of pain in the missing limb, as neighboring brain regions may take over the representation of the amputated area. Even though the limb is no longer there, the brain still thinks it should be there based on its old map. This happens because, after an amputation, the brain’s map of the body doesn’t immediately change. The brain redraws its map to adapt to the new reality, but this process can be a bit confusing. Sometimes, the remapping doesn’t happen smoothly, and the brain may still “feel” the missing limb and even sense pain from it.