Compared to narcolepsy, which is characterized by well-defined clinical, polysomnographic, and immunogenetic features, idiopathic hypersomnia is not delineated, and its history is much more recent. Because of the somewhat vague limits of idiopathic hypersomnia and its relative rarity, no prevalence study has been conducted. The only available data are the ratios of idiopathic hypersomnia to narcolepsy in different sleep disorders populations. The ...

Restless legs syndrome (RLS) is a neurological disorder characterized by uncontrollable urge to move when at rest. This urge stems from the unpleasant sensations such as burning, creeping or tugging in the legs and the movements are being made to relieve these feelings. These sensations are medically known as paresthesia (abnormal sensations) or dysesthesias (unpleasant abnormal sensations) and they range in severity from mildly uncomfortable to ...

Sudden Infant Death Syndrome (SIDS) is a condition characterized by the sudden death of an infant which remains unexplained after all known and possible causes have been carefully ruled out. These other possible causes are investigated through autopsy, death scene investigation, or review of the medical history.Most SIDS deaths are associated with sleep, and infants who die of SIDS show no signs of suffering. Most deaths occur between 2 and 4 mon ...

Insomnia is a disorder characterized by an inability to sleep or to remain asleep for a reasonable period. People who suffer from insomnia typically complain of being unable to rest for more than a few minutes at a time. There are many organic causes of insomnia but most commonly it is caused by fear, stress, anxiety, medications, herbs or caffeine. An overactive mind or physical pain may also be the cause. Most experts claim that finding the und ...

 Almost everyone has experienced, at least once in a lifetime, some kind of back pain. This pain could be acute or short-term which means that it generally lasts from a few days to a few weeks, and it can be chronic- which represent a pain that persists for more than 3 months. It is often progressive and the cause can be difficult to determine. Most acute back pain is the result of trauma to the lower back or a disorder such as arthritis. ...