Mystery still surrounds the experience of pain. It is highly subjective but why do some people feel more pain than others and why does the brain appear to switch off under anaesthesia so we are unaware of the surgeon’s scalpel? Professor Irene Tracey uses brain scanners to ask if we can actually see pain in the brain. On air we hear for the first time the results of the latest research into diabetes and nerve pain. Promising new techniques means scientists are able to see regions in the brain which effectively turn up the pain in some people and not others.

Anaesthetics prevent pain during surgery but how the brain disengages is only just beginning to be understood, which could in the future lead to personalised doses of anaesthetics leading to faster recovery times.

Picture: Graphic of neurons firing in the of the neural network within the Brain, Credit: Science Photo Library