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A Method for Tracking the Time Evolution of Steady-State Evoked Potentials
Published on: May 25, 2019
Steady state visually evoked potential (SSVEP) topography changes associated with cocoa flavanol consumption.
D A Camfield1, A Scholey, A Pipingas
1Centre for Human Psychopharmacology, Swinburne University, PO Box 218 Hawthorn Victoria 3122, Australia. dcamfield@swin.edu.au
Physiology & Behavior
|November 29, 2011
Summary
Daily cocoa flavanol consumption improved brain activity for spatial working memory in middle-aged adults. This neurocognitive enhancement occurred without significant changes in behavioral performance, suggesting increased neural efficiency.
Area of Science:
- Neuroscience
- Cognitive Science
- Nutritional Science
Background:
- Cocoa flavanols are compounds found in cocoa beans with potential cognitive benefits.
- Spatial working memory is crucial for various cognitive functions and can decline with age.
- Previous research suggests flavanols may impact brain function, but direct evidence on neural efficiency is limited.
Purpose of the Study:
- To investigate the effects of daily cocoa flavanol supplementation on spatial working memory.
- To assess neurocognitive changes using electrophysiological methods (Steady State Probe Topography).
- To determine if cocoa flavanols enhance neural efficiency in spatial working memory.
Main Methods:
- A 30-day randomized, double-blind, placebo-controlled trial involving 63 middle-aged volunteers (40-65 years).
- Participants consumed daily drinks with 250 mg or 500 mg cocoa flavanols or a placebo.
- Spatial Working Memory tasks were assessed at baseline and post-intervention using behavioral measures and Steady State Probe Topography (SST) to analyze steady state visually evoked potentials (SSVEPs).
Main Results:
- No significant differences in behavioral accuracy or reaction time were observed between groups.
- Significant differences in SSVEP amplitude and phase were found at posterior parietal and centro-frontal sites during memory encoding, hold, and retrieval phases.
- These electrophysiological changes indicate altered brain activation patterns associated with cocoa flavanol intake.
Conclusions:
- Chronic cocoa flavanol consumption may enhance neural efficiency in spatial working memory.
- Despite no behavioral improvements, altered brain activation suggests a more efficient cognitive process.
- Cocoa flavanols show potential as a dietary intervention for supporting cognitive function in middle-aged adults.
