外研版高中英語選修8module5theconquestoftheuniverseperiodone基礎(chǔ)訓(xùn)練2-在線瀏覽
2025-02-04 19:49本頁面
【正文】 thers are awakened by the lightest sound? To find the answer， sleep researchers at Massachusetts General Hospital conducted an unusual study of 12 self173。 Period One Warm173。up amp。described deep tests confirmed that the healthy volunteers were solid sleepers， they took part in a three173。frequency brain activity ing from deep inside the brain during source of the spindles is the thalamus(丘腦 )，a part of the brain that sends sensory information to the rest of the cortex(皮層 )． Before the study， the Massachusetts researchers theorized that the spindles are the brain’s way of preventing sensory information from passing through the thalamus and waking the rest of the brain during found that sleepers who experienced the most sleep spindles during the night were also the soundest sleepers and were least likely to be awakened by noise. Scientists already know that most people bee lighter sleepers with age， most likely because older people experience less “slow wave sleep” ， which is the deepest stage of also produce fewer sleep spindles as they even when controlling for the stage of sleep a person was in， the number of sleep spindles still predicted their risk for awakening because of noise. More research is needed， but the findings suggest that a better understanding of sleep spindles could lead to new behavioral or drug therapies for people with sleep example， future studies may try to determine whether diet， exercise or other behaviors may influence the number of sleep spind
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