Stage 2 non-REM sleep is a period of light sleep before you enter deeper sleep. Your heartbeat and breathing slow, and muscles relax even further. Your body temperature drops and eye movements stop. Brain wave activity slows but is marked by brief bursts of electrical activity. You spend more of your repeated sleep cycles in stage 2 sleep than in other sleep stages.
Sleep is an important part of your daily routine—you spend about one-third of your time doing it. Quality sleep – and getting enough of it at the right times -- is as essential to survival as food and water. Without sleep you can’t form or maintain the pathways in your brain that let you learn and create new memories, and it’s harder to concentrate and respond quickly.
If you routinely fall asleep within 5 minutes of lying down, you probably have sleep deprivation or a sleep disorder. Microsleeps, or very brief episodes of sleep in an otherwise awake person, are another mark of sleep deprivation. In many cases, people are not aware that they are experiencing microsleeps. Some suspect that the widespread practice of “burning the candle at both ends” among harried workaholics has changed perceptions so much that what is really abnormal sleepiness is now considered normal.
Sleep stability means pinning your bedtime to the same time every night, even on weekends, and waking up at the same time every morning, even on weekends. The key is to settle into a groove or a cycle that your body understands and responds to. Once you do this, it’s really quite amazing. You’ll sleep better, feel better, have more energy, and worry less.
According to the American Sleep Association, one in every three adults experiences occasional insomnia, while another one in 10 has chronic insomnia. While most of us crave a good night’s sleep for the short-term benefit of feeling more alert, we also realize that sleep is crucial to our health. During those nightly hours of shut-eye, our bodies experience a prolonged period of repair and renewal that can improve everything from treatment of chronic conditions to weight management.
Herbal teas like chamomile and valerian act as a mild sedative. They relax the body and make you feel like your eyes are too heavy to keep open. Of all the herbal teas, I recommend the Celestial Extra Sleepy Time Tea. Not to throw a product placement out there, but this stuff works. It contains pretty much everything that contributes to sleep - chamomile, tilia estrella, and valerian. The combination in this is like a slumber guarantee.
Taking a nap might seem counter-intuitive to good nighttime sleep, but short naps of 10 to 30 minutes actually help you gain extra energy during the day and don’t disrupt your sleep. Even a 10-minute nap can improve your alertness for 2-and-a-half hours if you’re sleep-deprived, and you can feel the benefit for up to 4 hours if you are well-rested.
Sleep is not just a block of time when you are not awake. Thanks to sleep studies done over the past several decades, it is now known that sleep has distinctive stages that cycle throughout the night. Your brain stays active throughout sleep, but different things happen during each stage. For example, certain stages are needed to help you feel rested and energetic the next day, and other stages help you learn and make memories. A number of vital tasks carried out during sleep help maintain good health and enable people to function at their best. On the other hand, not getting enough sleep can be dangerous for both your mental and physical health.*
A very common cause of difficulty sleeping relates to stress and the intrusion of stimulating substances and activities. You may have trouble falling asleep the night before a big test or presentation. In periods of emotional stress, such as after the death of a loved one, you may also have trouble sleeping. This is called acute insomnia. It usually passes when these stressors resolve. Similarly, stimulants such as caffeine and even nicotine can disrupt your sleep.
NINDS health-related material is provided for information purposes only and does not necessarily represent endorsement by or an official position of the National Institute of Neurological Disorders and Stroke or any other Federal agency. Advice on the treatment or care of an individual patient should be obtained through consultation with a physician who has examined that patient or is familiar with that patient's medical history.
Apparently it's all to do with sleep cycles rather than getting more hours of sleep. If you wake up at the wrong time during a sleep cycle, you'll find yourself more tired - even if you were asleep for longer. So if, for example, you need to be awake by 6am, you should either get your head down at 8.46pm, 10.16pm or even 11.46pm or - if you're feeling like a real night owl - 1.16am.
The thalamus acts as a relay for information from the senses to the cerebral cortex (the covering of the brain that interprets and processes information from short- to long-term memory). During most stages of sleep, the thalamus becomes quiet, letting you tune out the external world. But during REM sleep, the thalamus is active, sending the cortex images, sounds, and other sensations that fill our dreams.
For those who have difficulty with insomnia, there are a handful of options to help you sleep. One treatment option is sleep restriction. This involves limiting the amount of time that you spend in bed (often to 7-8 hours) so that the time you are there you are more likely to spend asleep. It can also be useful to observe a behavioral change called stimulus control. Stimulus control helps break the association between your bedroom and not being able to sleep.
Getting in sync with your body’s natural sleep-wake cycle, or circadian rhythm, is one of the most important strategies for sleeping better. If you keep a regular sleep-wake schedule, you’ll feel much more refreshed and energized than if you sleep the same number of hours at different times, even if you only alter your sleep schedule by an hour or two.
The key here is to keep dinners simple and moderate in portion, so you won’t be bothered with indigestion later. Eating carbs four hours before sleep was more effective than one hour prior in the study, meaning planning your evening meals could prove helpful. Spicy foods can also affect your ability to fall asleep quickly, so keep that in mind, too.