Of the 7 billion people on Earth,
roughly 6 billion own a cellphone, which is pretty
shocking, given that only 4.5 billion have access to a working toilet.
So how are these popular gadgets changing your body and brain?
If you ’ re looking down at your phone right now,
your spine angle is equivalent to that
of an 8 year old child sitting on your neck –
which is fairly significant considering people spend an average of 4.7 hours a day
looking at their phone.
This, combined with
the length of time spent
in front of computers has led to an increase in the prevalence of
myopia or nearsightedness in North America.
In the 1970s about ¼ of the population had
myopia, where today nearly half do;
and in some parts of Asia, 80-90 % of the population
is now nearsighted.
And it can be hard to put your phone down –
take for example the game Candy Crush.
As you play the game,
you achieve small goals causing your brain to be rewarded with little
bursts of dopamine – and eventually you are rewarded with new content.
This novelty also
gives little bursts of dopamine and together create what is known
as a ‘ compulsion loop ’
– which just happens to be the same loop responsible
for the behaviors associated with nicotine
or cocaine. Our brains are hard-wired to make us novelty seeking,
and this is why apps on
our phones are designed to constantly provide us with new content,
making them hard to put down.
As a result,
93 % of young people aged 18-29 report using their smartphones as a tool to
avoid boredom, as opposed to other activities such
as reading books or engaging with people around them.
This has created the new term ‘ nomophobia ’ –
the fear or anxiety of
being without your phone.
We also see a change in brain patterns:
alpha rhythms are commonly associated with ‘ wakeful
relaxation ’ like when your mind wanders off,
whereas gamma waves are associated with
conscious attentiveness. And experiments have shown
that when a cell phone is transmitting
– say during a phone call –
the power of these alpha waves is significantly boosted, meaning
phone transmissions can literally change theway your brain functions.
Your smartphone can also disrupt your sleep!
The screen emits a blue light which has been
shown to alter our circadian rhythms,
diminishing the time spent in deep sleep, which is linked
这就跟糖尿病 癌症 肥胖有关
to the development of diabetes, cancer andobesity.
Studies have shown that people who
read on their smartphone
at night have a harder time falling asleep and produce less melatonin
——一种负责调节睡眠 – 觉醒周期的激素
– a hormone responsible for the regulationof sleep-wake cycles.
Harvard medical school
advises the last 2-3 hours before bed be ‘ technology ’ free,
so pick up a book before bed instead.
Of course, smartphones also completely change our ability to access information –
most notably in poor and minority populations.
7% of Americansare entirely dependent on smartphones for
their access to the internet.
A 2014 studyfound that the majority of smartphone owners
use their phone for online banking,
to look up medical information and searching for jobs.
So while phones are in no way exclusively bad,
and have been a part of positive change
in the world, there’s no denying that theyare changing us.
But, many successful people have now decided
to take “ smartphone vacations ” in order
to increase productivity.
In our new AsapTHOUGHT video we
break down the top 6 reasons you
should take a smartphone vacation,
and how it could benefit your life right now.
And subscribe for more weekly science videos