| Objective: To explore the relationship between the ratio of dorsiflex/plantar (D/P) and eversion/inversion (E/I) peak torque of ankle and postural control function in functional ankle instability. Methods: Totally, 30 stroke patients were recruited for this study. Isokinetic muscle test was used to assess the ankle D/P and E/I value, and Pro-Kin 254 was used to assess the static balance ability, dynamic balance ability and proprioception. The correlation between the D/P value and E/I value and the affected ankle joint at different angular velocities and forward-backward motion velocity, left-right motion velocity, movement length, area of ellipse of motion, total deviation index, average trajectory error rate and standard deviation of total load was analyzed by the correlation analysis. Results: As compared with the unaffected ankle joint, the static balance ability (left-right motion velocity and movement length), dynamic balance ability (overall deviation index) and proprioception (average trajectory error rate and standard deviation of total load) of the affected ankle joint in FAI patients were significantly reduced (P<0.05). The D/P and E/I value of the affected ankle joint at 60°/sec and 120°/sec was significantly lower than that of the unaffected ankle joint (P<0.05), and that of the affected ankle joint at 60°/sec and 120°/sec was negatively correlated with forward-backward motion velocity, left-right motion velocity, movement length, area of ellipse of motion, total deviation index, average trajectory error rate and standard deviation of total load (P<0.05). Conclusion: The D/P value and E/I value of the affected ankle joint in FAI patients are related to their posture control ability, and have certain potential as the clinical evaluation index of the postural stability of FAI patients. |
