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--Wendell BerrySkip to content sleepdex - resources for better sleep good sleep for good health   why sleep? Stages of sleep aging patterns sleep debt sleep disorders insomnia other types of insomnia other sleep disorders sleep fragmentation   glossary about us     "oh bed! Oh bed! Delicious bed! That heaven upon earth to the weary head. generic viagra online overnight delivery " (thomas hood)   circadian rhythm disorders circadian rhythm sleep disorders (crsds) are an overall term covering a loss of synchronization between the internal biological clock and the external environment. The person with this type of disorder experiences insomnia and/or excessive daytime sleepiness on a regular basis. â the unusual sleep pattern causes distress or maladaption in the person’s job, family life, community activities, etc. Tests of cognitive ability show the effects of the body being out of sync with environmental cues. â some people get depressed or hyperactive when they have these disorders. Sleep is complex, but the current dominant (if somewhat simplistic) model of sleep need is that is results from an interaction of endogenous circadian and sleep homeostatic processes â people with untreated or unmanaged crsds do not necessarily run short of sleep and their homeostatic process works as it should. â the problem results from the two cycles getting out of sync. â when the people are awake at times their body’s want to sleep, they experience drowsiness, and when they try to sleep when their body wants to wake, they experience insomnia. â these are the characteristics of an crsd. Although a diagnosis of general circadian rhythm sleep is possible without further elaboration or specitifity, there are subtypes that can be characterized by the direction of the circadian shift and the source of the distress. Types include: delayed sleep phase syndrome. cheap online purchase viagra The circadian cycle is shifted several hours later in the day, so the person has trouble getting to sleep and waking up on time to meet social expectations. The behavior is common among teens, but if it persists into adulthood it can be considered a disorder. More on dsps. Advanced sleep-phase syndrome. â this is when the cycle is shifted in the opposite direction from delayed sleep phase disorder and results in early bedtimes and early rising. â social perceptions may lead to the notion that asps people are virtuous conscientious go-getters while dsps people are lazy, but there are biological bases for these syndromes. More on asps. Jet lag. Circadian disrhythm happening from rapid travel across time zones and finding oneself in a place with environmental cue not matching your body’s cues. A one-time jet lag is easily recovered from in a few days, so it doesn’t officially qualify as a crsd. â but frequent travel back and forth can put the body on edge and require intervention. "morning larks" find it particularly difficult to adjust. buy cheap generic viagra online Night owls generally have a better time at time. More on jet lag. buy cheapest viagra Shift work sleep disorder. buy cheap online viagra A classic example of a disorder caused by social expectations – in this case because of their employment. â it’s not so bad when the worker sticks to one shift (although that shift may put him out of sync with the daylight and family expectations). The worst is when shifts rotate. â for instance, a schedule of one week on day shift, followed by one week on swing shift, followed by one week on graveyard overnight shift screws up the body. â older workers are less able to adapt to these changes than younger ones. â as with jet lag, shift-work crsd is more likely to strike people who are typically early risers than night owls. More on shift work disorder. Free-running circadian disorder. â this is when the body’s circadian rythym drifts, apparently unentrained by zeitgeibers or daylight signals. â it is like a train off the track. More on free-running disorder. Irregular sleep-wake disorder is a natural form of polyphasic sleep, where the patient sleeps for longer than a nap but shorter than a full night’s sleep. â total sleep time is spread across the day and periods of sleep time change from one day to the next. buy discounted viagra â it is most common in the elderly. buy cheap generic viagra online More on iswd. Diagnosis the national guideline clearinghouse (part of the federal government) publishes parameters for clinical evaluation of circadian rhythm sleep disorder. These disorders are often misdiagnosed and treated, mostly because doctors are unaware of them or do not consider them when evaluating patients. viagra for sale no prescription â the doctor must rule out sleep problems caused by other disorders or mental problems, other illnesses, and medicines (both prescribed and recreational, including coffee. ) further, to qualify as a disorder, the sleepiness and insomnia must cause the person problems functioning at work or socially. buy cheap generic viagra online Treatment treatment or management is about readjusting the body’s and brain’s circadian rythym so is aligns with environmental cues, or in the case of shift-work disorder, social and community expectations. This readjustment is not a one-time thing normally. â it requires continuing intervention and alignment. Bright light treatment and melatonin can be used to treat this disorder, as well as hypnotics. lowest price on viagra One problem for doctors is in understanding the specifics of the circadian cycle in any individual patient. While researchers can do studies which measure body temperature and melatonin levels, the typical.