![]() Mental states – anxiety can keep a person awake at night, which makes them prone to sleepiness during the day.As well as the problem of trying to sleep, there is also the effect of being out of synchronisation with the body’s internal clock (the circadian rhythm). Shiftwork – it is very difficult to get good sleep while working shiftwork, especially night shift.Environmental factors – broken sleep can be caused by a variety of things such as a snoring partner, a baby that wakes, noisy neighbours, heat and cold, or sleeping on an uncomfortable mattress.Teenagers who stay out until the early hours of the morning on weekends may be tired during the week. Insufficient or inadequate sleep – long working hours and overtime can be tolerated for months or years before the symptoms of sleepiness take effect.An increased risk of accidents, especially motor vehicle accidents.Įxcessive daytime sleepiness can be caused by a wide range of events and conditions, including:.Difficulty thinking and making decisions – the mind feels ‘foggy’.Feeling drowsy, despite sleeping and napping – not refreshed on waking up.Symptoms of hypersomniaĭepending on the cause, the symptoms of hypersomnia may include: It is possible that a person with hypersomnia may have very disturbed sleep but not be aware of it. Sleeping and napping may not help, and the mind may remain foggy with drowsiness. In extreme cases, a person with hypersomnia might sleep soundly at night for 12 hours or more, but still feel the need to nap during the day. Under the International Classification of Sleep Disorders, daytime sleepiness is defined as ‘the inability to stay awake and alert during the major waking episodes of the day, resulting in unintended lapses into drowsiness or sleep’. The characteristics of hypersomnia vary from one person to the next, depending on their age, lifestyle and any underlying causes. Seek advice from your doctor or sleep disorder clinic if you still feel excessively sleepy. Hypersomnia can be helped or cured with a few adjustments to lifestyle habits. Other causes include sleep disorders, medication, and medical and psychiatric illnesses. This may be due to shiftwork, family demands (such as a new baby), study or social life. There are many different causes, the most common in our society being inadequate sleep. If you need, you can always set a secondary, appropriately loud alarm for a couple minutes later to make sure you don't oversleep.Hypersomnia means excessive sleepiness. Since you'll be sleeping lightly, you can use gentle alarms (like a wake up lamp or quiet, soft music) to wake up naturally. ![]() You can use it in two ways: if you're going to sleep now, you can calculate the optimal time to wake up if on the other hand you have to get up at a specific hour, it will tell you when is the next window for you to get to bed. The sleep calculator above helps you pick the best moment to go to sleep and the time to wake up so that the time between them allows for several full 90 minute sleep cycles. The best option is to wake up when we naturally drift to the lighter sleep phases and our brain is on the brink of consciousness, so the path to wakefulness is much shorter. We can feel unrested, groggy and cranky for a good part of the day. When the alarm clock wakes us up suddenly from deep sleep or interrupts the REM phase, our body doesn't appreciate it. Usually each cycle takes about 90 minutes. Interestingly enough, while your brain waves frequency is much higher than it was when you were in the deep sleep phase, it's even harder to wake you up.Īfter some time in the dreaming REM phase you fall back into deeper sleep and the cycle repeats. Your body is more or less paralysed, but your eyes move rapidly. REM stands for Rapid Eye Movement and describes the dreaming phase of your sleep. This is when the magic happens and you switch from NREM to REM sleep. Your brain doesn't stay in the deep sleep for long - within 90 minutes it speeds up back to theta and then to alpha waves. This means it's more difficult to wake up someone who's in the Slow Wave Sleep. in stage 3 of NREM, your brain oscillates much slower and is less perceptible to stimuli like light or sound. These are three NREM (Non-REM) stages of sleep. Brain waves frequency goes down from what we call alpha (8–13 Hz) to theta (4–8 Hz) and finally delta (1–4 Hz) frequency bands. Well, while this works for your battery powered electronics, humans have a different, more complicated system in place.Īs soon as you fall asleep, your consciousness drifts away and your brain slows down. It would seem that sleeping is a simple activity - you power down, regenerate over several hours and wake up fully recharged.
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