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. 
We know we told you to put away your phone before bed but, for this, we’ll make an exception. Try to drown out the noise of your fighting neighbours and their barking dog with an app like Sleep Genius ($6 on iTunes). Its underlying technology has been tested and used by NASA to help astronauts fall asleep. We say: If it’s good enough for the space program, it’s good enough for us.
Alcohol may initially sedate you, making it easier to fall asleep; however, as it is metabolized and cleared from your system during sleep, it causes arousals that can last as long as two to three hours after it has been eliminated. These arousals disturb sleep, often causing intense dreaming, sweating, and headache. Smoking while drinking caffeine and alcohol can interact to affect your sleep dramatically. These sleep disturbances may be most apparent upon awakening, feeling unrefreshed, groggy, or hungover.
Valerian root is a plant with roots that contain many healing properties, in particular for a relaxation and sedative effects. It’s often found in combination with chamomile in a tea. By increasing the amount of gamma aminobutryic acid (GABA), it helps calm the nerve cells in the brain, resulting in a calming effect. GABA works by blocking brain signals that cause anxiety and that ongoing trickle effect that can come from it. This calming effect has made it a favorite natural remedy for anxiety too. (9)
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Italiano: Addormentarsi, Español: quedarse dormido, Deutsch: Einschlaf‐Hilfen, Português: Dormir, Nederlands: In slaap vallen, Français: s'endormir, Русский: быстрее засыпать, 中文: 睡得更快、更香, Čeština: Jak usnout, Bahasa Indonesia: Lekas Terlelap, العربية: الاستغراق في النوم بسهولة, Tiếng Việt: Đi vào giấc ngủ, ไทย: ทำให้ตนเองหลับง่ายขึ้น, 한국어: 잠드는 방법, 日本語: 眠りにつく, हिन्दी: नींद लायें, Türkçe: Uykuya Nasıl Dalınır

Dr. Goldstein warned, however, that the sleep you get from an antihistamine isn’t going to be as restorative as unmedicated sleep. “It’s like alcohol,” she told us. “You’ll get sleep, but you’re not going to wake up with mounds of energy.” Dr. Zammit explains, “When you take a sedating antihistamine, REM sleep may be suppressed at the beginning of the night. But then it rebounds at the end of the night, and this can lead to vivid, intense, and sometimes disturbing dreams.”

Even a hint of dim light—8 to 10 lux—has been shown to delay the release of nighttime melatonin in humans. The feeblest of bedside lamps pumps out twice as much: anywhere from 20 to 80 lux. A subtly lit living room, where most people reside in the hours before bed, will hum at around 200 lux. Despite being just 1 to 2 percent of the strength of daylight, this ambient level of incandescent home lighting can have 50 percent of the melatonin-suppressing influence within the brain.

Valerian is thought to affect levels of one of the calming neurotransmitters in the body, gamma-aminobutyric acid (GABA). It also relieves muscle spasms and is thought to help alleviate menstrual period pain. Valerian is typically taken an hour before bed. A standard dose is 450 mg. If taken during the day, valerian may result in drowsiness—it is often taken in two to three 300 mg doses with meals. 
Trouble sleeping is often a symptom of another disease or condition, such as depression, chronic pain, medications, or stress, which might explain why it’s so common. Longitudinal course and impact of insomnia symptoms in adolescents with and without chronic pain. Palermo TM, Law E, Churchill SS. The journal of pain : official journal of the American Pain Society, 2012, Sep.;13(11):1528-8447.
There is usually no particular biological or health reason to worry about sleeping less or more than other people. Your spouse might get mad at you if you sleep too much and you might get into hot water if you nap on the job, but most people have no reason to worry about going outside the norms when it comes to sleep duration. You might think sleeping too much is a problem, that excessive sleep is a waste of time, and indeed hypersomnia is recognized as a clinical condition. But not all long sleepers can be classified as hypersomniac and in any cases, there is nothing doctors can do for hypersomnia except prescribe stimulants. So it may not be worth worrying about.

We evolved from bacteria in the ocean that could differentiate sunlight from darkness—that’s what ended up forming the human eye. That means every organism is responsive to a circadian rhythm that’s largely dictated by sunlight. The photo receptors in our eyes pick up on sunlight, which controls the release of melatonin and all these other neurotransmitters that dictate your energy levels throughout the day.

If you’re experiencing sleep debt, you may be tempted to take a nap as a quick fix; however, this isn’t the ideal solution. Naps can interfere with your ability to fall asleep at night and can further disrupt your sleep schedule; if you absolutely have to nap, keep it to an hour or so during peak sleepiness hours in the afternoon, but keep it short, or else you might not be able to fall asleep that night.
Getting a good night’s sleep may seem like an impossible goal when you’re wide awake at 3 a.m., but you have much more control over the quality of your sleep than you probably realize. Just as the way you feel during your waking hours often hinges on how well you sleep at night, so the cure for sleep difficulties can often be found in your daily routine.

Insomnia is defined as the inability to fall asleep, remain asleep, or get the amount of sleep an individual needs to wake up feeling rested. Its symptoms include difficulty falling asleep, frequent wake-ups during the night, waking up too early in the morning, daytime sleepiness, difficulty concentrating, and irritability. Insomnia can be acute (lasting one to several nights) or chronic (lasting from a month to years). It’s also the most common sleep complaint among Americans (especially women).
See a Doctor. While lifestyle changes are the first line of treatment for sleeplessness, if you’re still not getting enough rest after improving your bedtime routine and trying a variety of relaxation strategies, a physician may be able to help determine if your sleeplessness is merely a symptom of another health concern, and prescribe appropriate treatment.
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