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Grip force makes wrist joint position sense worse
Lin Li1, Shuwang Li1
1Department of Physical Education, Renmin University of China, Beijing, China.
Frontiers in Human Neuroscience
|June 16, 2023
Summary
Increased grip force significantly impairs wrist joint position sense. Even a mild grip (15% maximal voluntary isometric contraction) worsened proprioceptive accuracy compared to no grip, impacting injury prevention and rehabilitation strategies.
Area of Science:
- Biomechanics
- Neuroscience
- Human Movement Science
Background:
- Wrist joint proprioception is crucial for fine motor control.
- Understanding factors influencing proprioception is vital for injury prevention and rehabilitation.
Purpose of the Study:
- To investigate the effect of grip force on wrist joint position sense accuracy.
Main Methods:
- Twenty-two healthy participants performed wrist joint repositioning tasks.
- Grip forces tested were 0% and 15% of maximal voluntary isometric contraction (MVIC).
- Six wrist positions were assessed: pronation, supination, radial/ulnar deviation, and flexion/extension.
Main Results:
- Absolute error in position sense was significantly higher at 15% MVIC (3.8 ± 0.3°) compared to 0% MVIC (3.1 ± 0.2°).
- Proprioceptive accuracy was significantly worse with a 15% MVIC grip force.
Conclusions:
- Grip force negatively impacts wrist proprioception.
- Findings enhance understanding of wrist joint injury mechanisms.
- Results inform the design of injury prevention and rehabilitation devices.
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