> Neural activity refers to the constant flicker of electrical currents and transmissions in the brain. Excessive activity, or excitation, could manifest in numerous ways, from a muscle twitch to a change in mood or thought, the authors said.

> It’s not yet clear from the study whether or how a person’s thoughts, personality, or behavior affect his or her longevity.

https://news.harvard.edu/gazette/story/2019/10/nervous-syste...