why do we get sleepy at night

Well scientists aren t 100% sure about that! Some people say that it gives your body a chance to recuperate after a hard day, but the energy saved is only about 50 kcals for 8 hours sleep (about the same amount of energy in a slice of toast with no butter! ). I think there might be an evolutionary reason, traditionally humans couldn t do much at night because we don t have good night vision compared to lots of predators! Also, think about what would happen if we didn t sleep. Lack of sleep has serious effects on our brain s ability to function. Have you ever pulled an all-nighter?? and the after-effects: grumpiness, grogginess, irritability and forgetfulness.


After just one night without sleep, concentration becomes more difficult and attention span shortens considerably. Thanks for the good luck the operation went really well!! But I am pretty sore and groggy today! The pain killers and anesthetic are not making me feel good! I ve now got to wear a cast for 4 weeks booooo!!!
Many sleep disorders are rare. For example, in 15 years of practice, Davila has treated only a few cases of recurrent hypersomnia, in which people have periods of extreme sleepiness that come and go.


During an attack, a person may sleep up to 16-18 hours, rousing only to eat or use the bathroom. Episodes can last a few days or many weeks. But a few sleep disorders, such as or, are common. Major sleep disorders include: : Insomnia may be a symptom of a sleep disorder, so people with this complaint may need a thorough evaluation, Shives says. But it can also be a sleep disorder by itself. Insomnia makes it difficult to fall asleep or stay asleep. Sleep quality may be poor, leaving people feeling unrefreshed when they awake.


Sleep apnea: This loud snoring, gasping, choking, pauses in breathing, and sudden awakenings. The person repeatedly stops breathing long enough to interfere with sleep; these pauses also temporarily decrease a person's oxygen supply. During the day, people with sleep apnea often feel very sleepy. Sleep apnea can raise the risk of, and. Restless legs syndrome (RLS): RLS causes irresistible urges to move the legs while a person is lying down. The person may also feel creeping, crawling, burning, or painful sensations in the legs.


In a related sleep disorder called "periodic limb movement disorder," repetitive jerking movements or of the legs or arms during slumber lead to fragmented, unrefreshing sleep. Parasomnias: Parasomnias, or abnormal behaviors during sleep, include sleepwalking, sleep-talking, head-banging, and that cause people to sit up, flail, and scream. In one type of parasomnia called " behavior disorder," people may kick, punch, or wave their arms unintentionally (usually in response to a dream) while they're in REM sleep. This sleep disorder usually afflicts older men, according to Shives.


It has also been linked to an increased risk of, she adds. Narcolepsy: Narcolepsy's main symptoms are excessive sleepiness during the day or recurring "sleep attacks" that cause people to fall asleep uncontrollably during normal waking hours. Some people also have sudden spells of muscle weakness following emotional excitement and may fall to the ground. Some people with narcolepsy experience, where they can't move when falling asleep or just waking up. Other symptoms include vivid or while falling asleep or waking up.