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Bad effects
of lack of sleep

there is a tendency that people would like to show off how little time they
sleep. What’s more, a lot of people are made to sacrifice their sleep to work because
of their employers. However, inadequate sleep is harmful to humans’ both
physical health and mental health. Therefore, it is important to pay attention
to bad effects of lack of sleep. Inadequate sleep is bad to humans’ brain and
physical health.

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Lack of
sleep can decrease the accuracy and efficiency of humans’ brain. First, people who
do not get enough sleep have difficulty in judging which is the important
thing. The research carried out by Hendler from Tel Aviv University shows that
lack of sleep can make people cannot tell which is more important than others(Castillo,2015).
People react to both neutral and emotional images because two parts of the
brain, the anterior cingulate cortex and the amygdala, will not work normally
when they do not get enough sleep. Second, lack of sleep influences the work of
mind. If people do not sleep enough, they will probably make decisions without
consideration and have problems getting along with people. According to
Fryer(2006), people who do not sleep for more than 18 hours will be hard to
concentrate and process information and react more slowly. In addition, they
can’t memorize well. In summary, lack of sleep makes people’s brain not work

sleep is also harmful to physical health. First, people without enough sleep
are older than people at the same age. French researchers found that people get
6.5 years older than normal people if they regularly stay up late for about ten
years(Donnelly,2015). Second, lack of sleep can cause serious diseases. Prof
Foster said that though it is widely believed that people have to work at night
because of nightshifts, people will never get used to nightshifts according to
a lot of studies. Therefore, nightshift leads to serious diseases, including
high blood pressure and stroke. Third, lack of sleep can cause early death.
According to a study, people who sleep less than 6 hours are more likely to die
before 65 years old(Donnelly,2015). In summary, lack of sleep can damage
people’s physical health.

conclusion, lack of sleep has bac effects on the judgement and speed of the
brain and it also damages people’s physical health seriously. Therefore, in
order to keep health people should try to avoid nightshift and get enough
sleep. (403 words)



S. (2015, September 26) Sleep deprivation messes with the brains, emotional               response, makes everything seem important.

    Retrieved from   emotional-respone-makes-everything-seem-important-354564


L.(2015, July 27) Sleep deprivation ‘as bad as smoking’

     Retrieved from   as-bad-as-smoking.html


Fryer, B.
(2006, October) Sleep deficit: The performance killer.

      Retrieved from

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