What is 'selfish brain theory' in Biology?

This refers to a scientific hypothesis which states that the brain prioritises its own relatively high energy needs over those of the rest of the body. This hypothesis overturned the earlier belief among scientists that the energy needs of various organs of the body are met equally without any kind of internal discrimination within the body. The selfish brain theory was developed by German brain researcher Achim Peters to explain the prevalence of obesity as the result of an imbalance in the energy supplied to the brain and the metabolic system. Some believe that the selfish brain may be the consequence of evolutionary forces favouring an alert brain over an agile body.

Source: The Hindu, 18/12/2018