People who work rotating shifts have significantly lower levels of serotonin, a hormone and neurotransmitter in the central nervous system believed to play an important role in the regulation of sleep, according to a study published in the August 1st issue of the journal SLEEP.

Persons with narcolepsy with cataplexy have low levels of cerebrospinal fluid (CSF) hypocretin-1, a protein thought to help regulate sleep and wakefulness, according to a study published in the August 1st issue of the journal SLEEP.

In the first known study of its kind, an article published in the August 1st issue of the journal SLEEP finds that children with attention deficit hyperactivity disorder (ADHD), and whose sleep efficiency is poor, experience significant improvement on some measures of the Continuous Performance Test (CPT) if they are treated with methylphenidate (MPH).

Anxious or depressed mothers-to-be are at increased risk of having children who will experience sleep problems in infancy and toddlerhood, finds a study that published this month in Early Human Development.

Teenagers who stay up late on school nights and make up for it by sleeping late on weekends are more likely to perform poorly in the classroom. This is because, on weekends, they are waking up at a time that is later than their internal body clock expects.

College students who go to bed late are more likely to have poor quality sleep, which may affect their mental health and academic performance, according to a research abstract that will be presented Wednesday at SLEEP 2007, the 21st Annual Meeting of the Associated Professional Sleep Societies (APSS).

Sleep problems can influence a person's diet. Those who don't get enough sleep are less likely to cook their own meals and, instead, opt to eat fast food. It is the lack of nutritional value of this restaurant-prepared food that may cause health problems for these people in the long-run, according to a research abstract that will be presented Monday at SLEEP 2007, the 21st Annual Meeting of the Associated Professional Sleep Societies (APSS).

Children from low income families have more sleep problems than children from middle class families, potentially impacting their health and performance at school, according to research that will be presented at the American Academy of Neurology's 59th Annual Meeting in Boston, April 28 - May 5, 2007.