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Positive Relations Between Vision and Posture in the Fixation Task Performed Upright.
1University of Lille.
Motor Control
|June 8, 2019
Summary
During stationary gaze, eye movements and body sway are linked, especially in fixation tasks. This connection, however, showed little relation to cognitive involvement, supporting postural control models.
Area of Science:
- Neuroscience
- Biomechanics
- Human Motor Control
Background:
- Individuals exhibit unpredictable sway in upright stances.
- Eye movements are also unpredictable during fixation tasks.
- Understanding the interplay between visual function, posture, and cognition is crucial.
Purpose of the Study:
- To analyze visual functions, postural control, and cognitive involvement during stationary gaze.
- To investigate the relationship between eye movements and body sway in different visual tasks.
Main Methods:
- 14 healthy young adults participated.
- Participants performed fixation and free-viewing tasks (3 trials, 45s each).
- Eye movements and center of pressure (body sway) were recorded.
- Pearson correlation coefficients analyzed movement relationships.
- A subjective questionnaire assessed cognitive involvement.
Main Results:
- Significant positive correlations (n=32) were found between eye and body (head, neck, lower back) movements during the fixation task.
- Correlations were nonsignificant during the free-viewing task.
- Only 9.4% of significant correlations related to cognitive involvement.
Conclusions:
- Eye and body movements are synergistically linked during fixation tasks.
- This synergy appears independent of cognitive involvement in this context.
- Findings indirectly support the synergistic model of postural control.
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