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From Accelerometer to Cognition: Hand Motion Can Reflect Effects of Cardiac Coherence on Cognitive Flexibility
Alix Bouni1,2, Laurent M Arsac1, Olivier Chevalerias2
1University of Bordeaux, CNRS, Laboratoire IMS, UMR 5218, 33405 Talence, France.
Sensors (Basel, Switzerland)
|May 14, 2025
Summary
Practicing cardiac coherence (CC) before a cognitive flexibility task improved hand movement fractal dynamics. This suggests wearable sensors analyzing hand motion can reveal insights into cognitive flexibility and mental states.
Area of Science:
- Cognitive Neuroscience
- Behavioral Science
- Complex Systems
Background:
- Hand movements during goal-directed tasks display fractal patterns, not randomness.
- Wearable accelerometers can capture hand movement fluctuations, offering insights into fractal dynamics.
- Multifractal analysis of these fluctuations may reflect cognitive flexibility, potentially influenced by mental state.
Purpose of the Study:
- To investigate if practicing cardiac coherence (CC) impacts cognitive flexibility.
- To analyze hand movement dynamics using multifractal-multiscale detrended fluctuation analysis (MFMS-DFA).
- To assess the utility of accelerometer-derived hand motion for interpreting cognitive flexibility.
Main Methods:
- An experimental group practiced 5 min of CC before the Wisconsin Card Sorting Test (WCST); a control group did not.
- Hand motion data was collected using wearable accelerometers during the WCST.
- Multifractal-multiscale detrended fluctuation analysis (MFMS-DFA) was applied to hand movement time series.
Main Results:
- Hand movement time series exhibited nonlinear multifractality.
- Pre-task CC practice led to significant changes in multifractal metrics during the WCST shape condition.
- CC participants showed a lower multifractal degree in the shape condition, with comparable performance (perseverative errors).
Conclusions:
- Multifractal analysis of accelerometer-derived hand motion is a viable method for studying cognitive flexibility.
- Cardiac coherence practice may alter the fractal dynamics of hand movements during cognitive tasks.
- This approach offers a novel way to interpret changes in cognitive flexibility and mental states.
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