One of the most
controversial health
claims of modern
times is that age-related
diseases can be prevented by
regularly using computers.
Companies that make
‘brain-training’ apps often
conduct studies aiming to
prove that playing online
games helps to keep
the brain active as we
grow older.
But these are sometimes
disputed by medical
organisations and
advertising authorities.
Earlier this year one of the
leading ‘brain-training’
companies, Lumos Labs, was
fined $2m in the US for
saying that its Lumosity app
could alleviate the symptoms
of Alzheimer’s disease (see
News, Issue 467).
However, new research
from US scientists suggests
that logging on to a computer
once a week is enough to
fight dementia. In a four-year
study of 2,000 people aged
over 70, researchers at the
Mayo Clinic, Arizona, found
that using a PC helps people
retain memory and thinking
abilities in old age.
In fact, regular PC users
were 42 per cent less likely
to develop memory
problems (“mild cognitive
impairment”) that can lead
to dementia. Other activities
were tested, such as knitting,
completing crosswords and
attending social events. They
all helped to keep the brain
alert, but none was as
beneficial as computer use.
Scientists think that
people build up a ‘cognitive
reserve’ of new brain cells
when they take part in
mentally challenging
activities, such as computer
use. This might be effective
enough to offset age-related
deterioration
But how conclusive are the
results? Dr Janina Krell-
Roesch – who led the
research – urged caution,
saying that the study shows
only an “association”
between computer use and a
better memory in old age,
not “cause and effect”. It may
be that another aspect of
the computer users’ lifestyle
was helping them to retain
their memory.
Charities warned against
looking for simple solutions.
Dr Clare Walton, Research
Communications Manager at
the Alzheimer’s Society said
that dementia “is a complex
condition and we do not
know what effect these
activities have on the risk of
developing it”.
She added: “Currently, the
best evidence for reducing
your risk of dementia is to
exercise regularly, avoid
smoking, and eating a
healthy, balanced diet”.
It’s tempting to look for
magic bullets in the fight
to prevent dementia. As
people live longer, cases of
the condition are bound to
rise, putting a huge strain on
the NHS and social services.
The Alzheimer’s Society
estimates that there are
around 850,000 sufferers in
the UK (www.snipca.
com/19886).
But computer use is just
one part of staying mentally
fit. For every study that
promotes computer use,
there are others that urge the
over-65s to play musical
instruments, attend the
theatre and tackle cryptic
crosswords. These activities
have one thing in common
– mental stimulation.
What’s needed now are
more sophisticated studies
to show what kind of
stimulation works, and how
the brain benefits. There’s
still a lot we don’t know. Dr
Rosa Sancho, Head of
Research at Alzheimer’s
Research UK, said: “It’s
important that researchers
explore the link between
staying mentally active and
memory and thinking skills,
so we can understand what
role these sorts of activities
could play in dementia
prevention”.
With more and more lives
being destroyed by dementia,
it’s crucial that research
continues. Sensationalist
claims about miracle cures
can be swiftly dismissed, but
there is now overwhelming
evidence that the more
you exercise your brain,
the longer you’ll stay
mentally healthy.