Previous studies have shown that laser light treatment will improve working memory in mice. Human studies have shown tPBM treatment can improve accuracy. Improve high-order functions such as attention and emotion.
short-term memory has been found to benefit from laser light therapy.
According to researchers, the findings of the study were published in Science Advances. Scientists at the University of Birmingham in the UK and Beijing Normal University in China. Demonstrated that the therapy, which is non-invasive, could improve short term, or working memory in people by up to 25 per cent.
The treatment called transcranial photobiomodulation is applied to an area of the brain known as the right prefrontal cortex. In their experiment, the team showed how working memory improved among research participants after several minutes of treatment. They were also able to track the changes in brain activity using electroencephalogram monitoring during treatment and testing.
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In the study researchers at Beijing Normal University
Participants were treated with laser light to the right prefrontal cortex at wavelengths of 1064 nm. While others were treated at a shorter wavelength. Treatment was delivered to the left prefrontal cortex. Each participant was also treated with a sham, or inactive, tPBM to rule out the placebo effect. After tPBM treatment over 12 minutes. The participants were asked to remember the orientations or colour of a set of items displayed on a screen. The participants treated with laser light to the right prefrontal cortex at 1064 nm showed clear improvements in memory over those who had received the other treatments. While participants receiving other treatment variations were about to remember between 3 and 4 of the test objects. Those with the targeted treatment were able to recall between 4 and 5 objects.
Professor Ole Jensen, also at the Centre for Human Brain Health, said:
We need further research to understand exactly why the tPBM is having this positive effect. But it’s possible that the light is stimulating the astrocytes – the powerplants – in the nerve cells within the prefrontal cortex, and this has a positive effect on the cells’ efficiency. We will also be investigating how long the effects might last.
