What is the neurophysiological explanation behind phantom pain?

Phantom pain is a phenomenon where individuals who have lost a limb or other body part continue to experience pain or sensations in the absent limb. The neurophysiological explanation involves the brain's inability to adjust immediately to the loss of sensory input. After amputation, the neural circuits in the brain that used to receive signals from the missing limb may become hyperactive or reorganize, leading to the perception of pain or sensations in the phantom limb. This maladaptive plasticity and persistent activity in the central nervous system contribute to the experience of phantom pain.