This explains so much.
BTW just look how well-rested this fellow looks in his CPAP mask which is a treatment for sleep apnea.
Sleep apnea-related brain shrinkage can be reversible
By Elizabeth Allen - Express-NewsFor people with sleep apnea, it's a bad-news, good-news study.
The bad: The frequent interruptions of the brain's oxygen supply by serious sleep apnea result in shrinking gray matter in the brain.
The good: Those who faithfully follow their breathing-mask therapy can grow it back, according to the study.
Sleep apnea is a breathing disorder that involves a decrease or halt in airflow when the muscles relax during sleep and allow soft tissue to block the upper airway. A struggling sleeper may snore loudly and even wake frequently during the night in an effort to get more air.
The rest of the story: