A new study hints at why we get so unraveled after hours of hard mental labor: a toxic buildup of glutamate, the brain’s most abundant chemical signal.
You know the feeling. You’ve been cramming for a test or presentation all day, when suddenly you can’t remember simple things, like what you ate for breakfast, or where exactly Belize is. Now, a study hints at why we get so unraveled after hours of hard mental labor: a toxic buildup of glutamate, the brain’s most abundant chemical signal.
In the new study, researchers looked at whether levels of glutamate are related to behavior that so often manifests when we’re mentally exhausted. Seeking easy, immediate gratification, for example, or acting impulsively. Glutamate typically excites neurons, playing key roles in learning and memory, but too much of it can wreak havoc on brain function, causing problems ranging from cell death to seizures.
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