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Relationship between two proprioceptive measures and stiffness at the ankle
Carrie L Docherty1, Brent L Arnold, Steven M Zinder
1Curry School of Education, University of Virginia, 210 Emmet St South, Suite #203, P.O. Box 400407, Charlottesville, VA 22904-4407, USA. cld8n@virginia.edu
Summary
This study explored ankle stiffness, force sense, and reposition sense. Significant correlations were found between ankle stiffness and force sense in injured ankles, suggesting a link between proprioception and joint stability.
Area of Science:
- Biomechanics
- Neuroscience
- Sports Medicine
Background:
- Proprioception and joint stiffness are crucial for joint stability control.
- The relationship between proprioception and joint stiffness remains under-investigated.
Purpose of the Study:
- To investigate the relationship between ankle proprioception (force sense, joint reposition sense) and ankle muscle stiffness.
- To determine if ankle injuries affect these relationships.
Main Methods:
- Forty participants, including 20 with ankle sprain history, were assessed.
- Measures included active joint reposition sense, unilateral and contralateral force sense, and ankle muscle stiffness via transient oscillation.
- Custom-built equipment (ankle goniometer, load cell, inversion-eversion cradle) was utilized.
Main Results:
- No significant correlation was found between ankle stiffness and joint reposition sense (r=0.01–0.21).
- Significant correlations were observed between ankle stiffness and force sense.
- Contralateral force sense reproduction strongly correlated with stiffness in the injured ankle (r=0.47–0.65, P≤0.008).
Conclusions:
- Ankle muscle stiffness is significantly correlated with force sense, particularly in previously injured ankles.
- The causal relationship between altered force sense and increased muscle stiffness post-injury requires further research.
- Findings suggest potential implications for rehabilitation strategies focusing on proprioceptive deficits and joint stability.