February 17, 2012
VICTORIA, AustraliaOlder individuals who consume chocolate or cocoa powder containing high levels of flavonols been shown to have better brain performance and as easier time completing memory tasks compared to those who do not eat chocolate, according to a study published in the journal Physiology & Behavior.
Researchers at Swinburne University conducted a study to investigate whether chocolate or cocoa powder containing higher amounts of cocoa flavanols can positively influence brain performance in healthy middle-aged individuals naturally.
For the study, 63 middle-aged volunteers aged between ages 40 and 65 years were administered a daily chocolate drink containing 250mg or 500mg cocoa flavanols versus a low cocoa flavanol (placebo) drink over a 30-day period. Participants were tested at baseline as well as at the end of the treatment period on a test of Spatial Working Memory. Steady State Probe Topography (SST) was used to assess neurocognitive changes associated with cocoa flavanol supplementation during the completion of the Spatial Working Memory task.
Changes in the amplitude and phase of the SSVEP response after 30 days were compared between treatment groups. Behavioral measures of accuracy and reaction time were not found to be significantly different between treatment groups, while average SSVEP amplitude and phase differences at a number of posterior parietal and centro-frontal sites were found to be significantly different between groups during memory encoding, the working memory hold period and retrieval.
In the absence of significant behavioral effects, the differences in brain activation can be interpreted as evidence of increased neural efficiency in spatial working memory function associated with chronic cocoa flavanol consumption.
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