Neurons carry sensations to and from the specific limb that is having phantom pain to a region in the brain medically known as the somatosensory cortex, this is the area in the brain that receives information about pain, touch, temperature, and proprioception, which is the position in which a body is in from all over the body. Once an amputation has occurred, the somatosensory neurons are then deprived of their normal source of neuronal input, which means the neurons will begin to signal that sensations are occurring in certain parts of the body, which lead to the somatosensory cortex.