Psychology Today


Commentary, Research and News that cover all aspects of Human Behavior, from the workings of the brain, to relationships and the larger cultural forces that influence our decisions.

The brain runs a monopoly on your energy, but what about your conversations?

There’s a common principle taught in undergraduate physiology courses that explains how powerful the human brain is. Despite making up approximately 2 percent of the body’s weight, the brain consumes approximately 20 percent of the body’s oxygen.1 This "2 for 20 Rule" recognizes that the brain is more than a thought generator between our ears. The brain regulates a variety of hormones, neurotransmitters, and plastic, functional neural responses that beget feelings, thoughts, actions, moods, and even epigenetic changes. It is no wonder that this small, fatty organ monopolizes our body budget. 

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