In experiments involving people with epilepsy, targeted zaps of the lateral orbitofrontal cortex region of the brain helped ease depressive symptoms. Getty Images hide caption
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The study drew on survey data from half a million U.S. teenagers from 2010 to 2015. martin-dm/Getty Images hide caption
Increased Hours Online Correlate With An Uptick In Teen Depression, Suicidal Thoughts
In addition to profound exhaustion that isn't relieved with sleep, the illness now called ME/CFS includes flu-like symptoms, muscle pain, "brain fog" and various other physical symptoms, all of which typically worsen with even minor exertion. Malte Mueller/Getty Images hide caption