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22 January, 2003 - BBC News
Scientists believe they may have found a way to improve
our memory by as much as 10%.
Researchers at Imperial College London have used a
technique called neurofeedback to train people to remember more
clearly.
It works by showing people their own brainwaves on
a computer screen, and teaching them how to control them.
This is the first time we have shown a link between
the use of neurofeedback, and improvements in memory
Brain activity is monitored through sensors attached
to the scalp. The patient can see the brainwaves on a screen.
This enables them to see how different moods and behaviour
affects the brain. They are then taught how to control their brain
activity and correct or stabilise it.
Dr David Vernon tested the technique on 40 people.
They each had a memory test before and after their neurofeedback
session.
They were presented with a series of words which related
to specific categories. They were then given the categories and
asked to recall related words.
Those who underwent neurofeedback were able to recall
82% of the words after their session. This compares to just 71%
prior to the treatment.
In comparison, a group of people who did not undergo
neurofeedback saw their recall rate increase from 73% to just 75%.
Dr Vernon said: "Previous research has indicated
that neurofeedback can be used to help treat a number of conditions
including attention deficit hyperactivity disorder, epilepsy and
alcoholism by training particular aspects of brain activity.
"But this is the first time we have shown a link
between the use of neurofeedback, and improvements in memory."
Professor John Gruzelier, from Imperial College London
at Charing Cross Hospital said further study is needed.
But he suggested the technique could help patients
who have brain damage or memory problems.
"Neurofeedback has been proven to be effective
in altering brain activity, but the extent to which such alterations
can influence behaviour are still unknown.
"Further tests are needed to confirm this, but
if neurofeedback can positively influence the cognitive performance
of healthy individuals, as we have previously shown on attention
and musical performance, it opens up the possibility that such treatment
may be beneficial for those suffering from cognitive deficits".
The study is published in the International
Journal of Psychophysiology.
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