Saturday, December 26, 2020

Your brain on cortisol: Why overstressed gray matter is leading us astray in lockdown


https://www.nbcnews.com/news/us-news/your-brain-cortisol-why-overstressed-gray-matter-leading-us-astray-n1252251

 

Dec. 25, 2020, 4:30 AM EST
By Elaina Patton


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The prolonged traumatic, or "chronic toxic," stress that most people have been experiencing throughout the pandemic makes it more difficult to keep desires in check, and it in turn promotes illogical pleasure-seeking, said Dr. Robert Lustig, a professor emeritus of pediatric endocrinology at the University of California, San Francisco, and author of "Metabolical." In scientific terms: When brains are flooded with the stress hormone cortisol on a long-term basis, it inhibits the function of the prefrontal cortex, leading to excessive activation of the "reward center" of the brain — triggering the excessive baking, drinking, smoking and shopping that filled the idle hours of 2020.

"Dopamine is the reward neurotransmitter. It is held in check by the prefrontal cortex. When that inhibition is released, the reward center looks for hedonic stimuli," Lustig said. "Those can be chemical — cocaine, heroin, nicotine, alcohol, sugar — or behavioral — shopping, gambling, internet gaming, social media, pornography."

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