What is the phenomenon that occurs when an individual feels sensations in a limb that is no longer present?

Phantom limb sensation refers to the phenomenon where individuals who have undergone an amputation continue to experience sensations in the limb that is no longer there. This can include feelings of warmth, coldness, itching, or even pain in the area where the limb used to be. The underlying mechanism is believed to involve the brain's representation of the body and how the nervous system responds to the loss of the limb. The brain and nervous system can remain responsive to stimuli that used to come from that limb, leading to these sensations.

Phantom limb sensation is significant because it highlights the complex interactions between the brain's perception and physical reality, as well as offering insights into pain management and rehabilitation for amputees. Understanding this phenomenon is essential for healthcare providers who need to address the emotional and physical aspects of recovery for individuals with amputations.