"On average, a person needs about eight hours a night to preserve performance, said Cohen, a neurologist. Acute sleep loss is being awake for more than 24 hours in a row and chronic sleep loss is getting only about four to seven hours of sleep per night, he said.
Cohen's team tracked nine healthy volunteers -- five men and four women -- to see what effect a combination of acute sleep loss, chronic sleep loss and biological sleep rhythm might have on their ability to function.
The researchers found that while most participants caught up on acute sleep loss with a single night of 10 hours sleep, those with chronic sleep loss showed deteriorating performance for each hour spent awake."
14 January 2010
This is me, Miss Chronic Sleep-Loss