A potentially life-threatening breathing disorder characterized by brief interruptions of breathing during sleep. Most patients with sleep apnea snore loudly and are very sleepy during the day.
A chronic sleep disorder characterized by excessive or overwhelming daytime tiredness, even after an adequate amount of sleep. Other symptoms include the sudden loss of strength in the muscles, sleep paralysis, and hallucinations occurring while falling asleep or upon waking up.
Sleep disorders characterized by sudden arousal during various stages of sleep. Parasomnias include night terrors, sleep walking and sleep talking.
DELAYED SLEEP PHASE SYNDROME (DSPS)
If you stay up extremely late, say until 2 a.m. to 4 a.m., and then sleep all morning and get up around noon, you may suffer from DSPS. This condition can cause daytime sleepiness and impaired performance at work or school. DSPS is common in teenagers, young adults and college students.
ADVANCED SLEEP PHASE SYNDROME (ASPS)
This condition is characterized by falling asleep early, usually between 6 p.m. and 8 p.m., and waking up before dawn. ASPS affects many adults over the age of 65.
If you sleep too much, you might suffer from hypersomnia. Symptoms of hypersomnia include sleeping in too late, chronic depression, chronic fatigue, feelings of jet-lag, circadian rhythm disorders or medical illnesses.
RESTLESS LEG SYNDROME
A sleep disorder in which a person experiences unpleasant sensations in the legs described as creeping, crawling, tingling, pulling, or painful. These sensations usually occur in the calf area but may be felt anywhere from the thigh to the ankle. Restless legs can make it very difficult to fall asleep.
PERIODIC LIMB MOVEMENTS IN SLEEP (PLMS)
People who suffer from PLMS experience involuntary and repetitive leg jerking while sleeping.