What are the signs indicating that someone is not getting enough sleep?
Sleep deprivation studies have shown repeatedly that the early signs of not getting enough sleep are progressive slowing of reactions and increased numbers of brief attention lapses. If you have been cutting back on sleep for a day or two or if you are trying to stay up for a whole night, you are likely to miss the early signs of not getting enough sleep. However, when you do something sedentary for more than 10 minutes or so, particularly something that demands sustained attention, you are likely to perform poorly. The effects of too little sleep increase relentlessly from the time you last slept. Brain imaging studies of volunteers who have lost about one night’s sleep show significant reductions in basal activity especially in the frontal areas. However, other studies have found that when sleep deprived subjects are engaged in mental work, such as trying to recall a previously memorized list of words, the frontal and parietal brain areas become more active than during comparable men
