Scientists have discovered that the brain has a triple network linked to the mind —— that is to say, feelings and moods. For example, when we are well, our feelings manifest themselves and turn on the "motivation switch" that prioritizes one of these networks. Conversely, these networks are also involved in the fact that pushing our bodies too hard when we feel fatigued can be a cause of psychological problems. The mechanisms linking the brain, the body, and the mind are gradually being uncovered.

It was long believed that neurons were not produced in the brain past the early developmental stages. However, the 2000s saw the discovery that neurons are generated even in adults. Since then, the increasing number of researchers have been investigating links to PTSD and other mental illnesses, gradually shedding light on adult neurogenesis and its close relationship to the body and mind. One could even say that physical health significantly affects neurogenesis, which might offer a ray of hope for combating dementia. Moderate exercise, diet, sleep, and relaxation are crucial.