Second, play is an antidote to stress, and this is key because stress, in addition to being an enemy of productivity, can actually shut down the creative, inquisitive, exploratory parts of our brain. You know how it feels: you’re stressed about work and suddenly everything starts going wrong. You can’t find your keys, you bump into things more easily, you forget the critical report on the kitchen table. Recent findings suggest this is because stress increases the activity in the part of the brain that monitors emotions (the amygdala), while reducing the activity in the part responsible for cognitive function (the hippocampus) — the result being, simply, that we really can’t think clearly.
— Essentialism (Greg Mckeown), Loc. 949–54