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Green tea boosts working memory, says study

AFP  Geneva, April 12, 2014
First Published: 20:21 IST(12/4/2014) | Last Updated: 20:42 IST(12/4/2014)
A beverage with multiple benefits, green tea has inspired a number of research projects in recent years. One of the latest studies on the subject, that was recently published in the journal Psychopharmacology, offers additional evidence on how the drink can improve working memory and cognitive performance.

According to various studies, the antioxidant-rich beverage may help in maintaining weight and fighting bad cholesterol, in addition to improving memory and preventing cognitive decline. The latter benefits, in particular, were the subject of a key study by Chinese researcher Bai Yun that was previously published in Food Science and Molecular Nutrition and Food Research in June 2012.

Eager to evaluate the theories of green tea’s power to improve memory and to identify the mechanism behind it, researchers in Basel, Switzerland, asked a group of healthy volunteers to consume a soft drink with green tea extract before solving a series of working memory tasks. The test subjects’ brain activity was analysed using an MRI machine.
The researchers, led by Christoph Beglinger and Stefan Borgwardt, of the University Hospital of Basel and the Psychiatric University Clinics respectively, observed improved connectivity between the frontal and parietal brain regions in the test subjects who were given the green tea extract.

This improved connectivity between the two brain regions correlated with enhanced performance of the memory tasks. “Our findings suggest that green tea might increase the short-term synaptic plasticity of the brain,” Borgwardt indicated through the research.

In the future, the findings of the study could be used to assess the effectiveness of green tea extracts in treating dementia and other neuropsychiatric illnesses, according to the researchers.

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