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Orderliness of Visual Stimulus Motion Mediates Sensorimotor Coordination.
Joshua Haworth1,2,3, Nicholas Stergiou3,4,2
1Department of Kinesiology, Science and Learning Center, Whittier College, Whittier, CA, United States.
Frontiers in Physiology
|October 27, 2018
Summary
This study shows that the human brain couples more effectively with chaotic visual motion, suggesting chaos is beneficial for sensorimotor coordination and environmental interaction.
Area of Science:
- Neuroscience
- Biomechanics
- Dynamical Systems
Background:
- Sensorimotor coordination is crucial for interacting with the environment.
- Understanding how the brain processes complex environmental dynamics is an ongoing challenge.
Purpose of the Study:
- To investigate the coupling between gaze, postural sway, and visual stimuli with different temporal structures.
- To determine if chaotic motion offers unique advantages in sensorimotor coordination.
Main Methods:
- Utilized Cross Recurrence Quantification Analysis (cRQA) to analyze the coupling between gaze/postural sway and visual stimulus motion.
- Visual stimuli included periodic (sine), chaotic, and aperiodic (brown noise) motion patterns.
- Quantified coupling using cRQA parameters like percent determinism and Maxline.
Main Results:
- Gaze coupling was strongest with periodic and chaotic motion, weaker with aperiodic motion.
- Postural sway exhibited complex periodicity, facilitating interaction with non-simple environmental dynamics.
- Chaotic motion showed a particular affinity in the Maxline analysis.
Conclusions:
- Chaos appears to be a beneficial and invariant feature of biological motion.
- This finding supports the critical role of chaos in robust self-environment coordination.
- Complex periodicity in body sway aids interaction with complex environmental dynamics.
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