Institute of Cognitive Neuroscience, UCL
ID de réunion : 963 4225 1199
Code secret : 427078
Following arm-amputation, brain areas that previously operated the hand will be freed-up, and could potentially be “recruited” to work for other body parts. This process, termed brain plasticity, is widely held to result in the experience of phantom limb pain (pain that is perceived to be arising from the missing hand), and is therefore considered to be maladaptive. I will present evidence to challenge the proposed link between brain plasticity and phantom pain, and instead demonstrate that brain representation of the missing hand persists decades after amputation. I will next explore the idea the idea that brain plasticity can be harnessed to support adaptive behaviour. I will demonstrate hand-like representation of the toes of foot painters, born with missing upper limbs. Finally, I will present some recent studies looking at how able-bodied participants learn to use a robotic Third Thumb to provide a first glimpse into brain plasticity for motor augmentation. I will argue that brain plasticity is best driven by meaningful inputs, and could be exploited for improving rehabilitation, with exciting opportunities for substitution and augmentation devices. A more nuanced understanding of brain plasticity is needed in order to clarify the neural basis of phantom limb pain.