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Effects of online-bandwidth visual feedback on unilateral force control capabilities
Joon Ho Lee1,2, Nyeonju Kang1,2,3
1Department of Human Movement Science, Incheon National University, Incheon, South Korea.
Plos One
|September 17, 2020
Summary
A narrow bandwidth threshold range in visual feedback improved force control in women
Area of Science:
- Motor Control
- Human Movement Science
- Biomechanics
Background:
- Online-bandwidth visual feedback is crucial for refining motor control.
- Understanding the impact of feedback threshold ranges on force control is essential for rehabilitation and training.
Purpose of the Study:
- To investigate how varying threshold ranges of online-bandwidth visual feedback affect unilateral force control in healthy young women.
- To determine the influence of feedback precision on force accuracy, variability, and regularity.
Main Methods:
- Twenty-five young women performed unilateral hand-grip force control tasks at 10% and 40% of maximum voluntary contraction (MVC).
- Participants utilized visual feedback with either a ±5% or ±10% bandwidth threshold range (BTR).
- Force accuracy, variability, regularity, and time/duration outside the BTR were measured.
Main Results:
- The non-dominant hand demonstrated enhanced force control (improved accuracy, reduced variability and regularity) with a narrower ±5% BTR at higher force levels.
- Both hands exhibited increased instances and duration of being outside the BTR when using the narrower ±5% BTR.
Conclusions:
- A narrow threshold range of online-bandwidth visual feedback can reveal temporary enhancements in unilateral isometric force control.
- Feedback precision plays a significant role in modulating force control capabilities, particularly under higher force demands.
