Obesity, especially if it causes obstructive sleep apnea When no
cause for the sleepiness can be found, it is called idiopathic
hypersomnia. PROBLEMS STICKING TO A REGULAR SLEEP SCHEDULE
Problems may also occur when you do not stick to a regular sleep
and wake schedule. This occurs when people travel between time
zones and with shift workers who are on changing schedules,
especially nighttime workers. Disorders that involve a disrupted
sleep schedule include: Irregular sleep-wake syndrome Jet lag
syndrome Paradoxical insomnia (the person sleeps a different
amount than they think they do) Shift work sleep disorder
Abnormal behaviors during sleep are called parasomnias. They are
fairly common in children and include: REM sleep-behavior
disorder (a person moves during REM sleep and may act out
dreams) Allen J. Blaivas, DO, Clinical Assistant Professor of
Medicine UMDNJ-NJMS, Attending Physician in the Division of
Pulmonary, Critical Care, and Sleep Medicine, Department of
Veteran Affairs, VA New Jersey Health Ca