According to the authors, adequate, good quality sleep is fundamental 
to human functioning and well-being. Sleep deprivation and sleepiness 
have adverse effects on performance, response times, errors of 
commission, and attention or concentration. Furthermore, sleep 
duration has been found to be associated with a wide range of quality 
of life measures, such as social functioning, mental and physical 
health, and early death.

"The detrimental effects of too much, too little and poor quality 
sleep on various aspects of health have begun to receive more 
attention," Ferrie added. "Given that our 24/7 society increasingly 
impinges on the lives of many people, it is important to consider 
what effects changes in sleep duration may have on health and 
well-being in the long term."

http://www.medicalnewstoday.com/articles/223845.php


"People Who experience mood swings, fear, voices and visions"