PDF(Pubmed)
Abstract：
BACKGROUND: Ankle braces can effectively decrease the incidence of recurrent ankle sprain; however, whether the brace can decrease the severity of sprain and its related mechanism during sprain remain unknown.
METHODS: Twenty-two patients with functional ankle instability (FAI) (12 males and 10 females) and 16 healthy subjects (8 males and 8 females) were enrolled in this study. All of the subjects walked on a custom-built tilting platform that offered a 30° inversion (IV) to mimic the IV of ankle sprain. We collected the kinematic and surface electromyography data of patients with FAI with or without ankle brace and normal controls 6 times.
RESULTS: The FAI without brace group showed significantly higher maximum IV angles and average IV velocities than the control group (P < .001). The FAI with brace group revealed significantly lower maximum IV angles and average IV velocities than the FAI without brace group (P < .001); this group also showed significantly higher maximum external rotation (ER) angle and average ER velocities than the FAI with brace (P < .001) and control (P < .001) groups. The FAI with brace group indicated significantly lower average EMGPrep (P = .047), EMGTilt (P = .037), and EMGafterTilt (P = .004) of the peroneus longus than the FAI without brace group.
CONCLUSIONS: The ankle brace could effectively decrease IV angles and their velocities and increase ER angles and their corresponding velocities during ankle sprain in patients with FAI. It could also decrease the activity of the peroneus longus muscle during ankle sprain.
METHODS: Twenty-two patients with functional ankle instability (FAI) (12 males and 10 females) and 16 healthy subjects (8 males and 8 females) were enrolled in this study. All of the subjects walked on a custom-built tilting platform that offered a 30° inversion (IV) to mimic the IV of ankle sprain. We collected the kinematic and surface electromyography data of patients with FAI with or without ankle brace and normal controls 6 times.
RESULTS: The FAI without brace group showed significantly higher maximum IV angles and average IV velocities than the control group (P < .001). The FAI with brace group revealed significantly lower maximum IV angles and average IV velocities than the FAI without brace group (P < .001); this group also showed significantly higher maximum external rotation (ER) angle and average ER velocities than the FAI with brace (P < .001) and control (P < .001) groups. The FAI with brace group indicated significantly lower average EMGPrep (P = .047), EMGTilt (P = .037), and EMGafterTilt (P = .004) of the peroneus longus than the FAI without brace group.
CONCLUSIONS: The ankle brace could effectively decrease IV angles and their velocities and increase ER angles and their corresponding velocities during ankle sprain in patients with FAI. It could also decrease the activity of the peroneus longus muscle during ankle sprain.
摘要：
背景：踝关节矫正器能有效降低踝关节扭伤的发生率；支具能否减轻扭伤的严重程度及其在扭伤期间的相关机制尚不清楚。
方法：本研究纳入了22例功能性踝关节不稳（FAI）患者（男12例，女10例）和16例健康受试者（男8例，女8例）。所有受试者都在定制的倾斜平台上行走，该平台提供30°倒置（IV）以模仿脚踝扭伤的IV。我们收集了6次有或没有踝关节支撑的FAI患者和正常对照组的运动学和表面肌电图数据。
结果：无支撑FAI组的最大IV角度和平均IV速度明显高于对照组（P<0.001）。有支具的FAI组显示最大IV角和平均IV速度明显低于无支具的FAI组（P<.001）；该组也显示出最大外旋（ER）角和平均ER速度明显高于有支具的FAI组（P<.001）和对照组（P<.001）。带支撑组的FAI显示平均EMGPrep显着降低（P=.047），EMGTilt(P=.037),腓骨后倾（P=.004）比无支撑组的FAI。
结论：在FAI患者踝关节扭伤时，踝关节支具可有效降低IV角及其速度，增加ER角及其相应的速度。它还可以减少踝关节扭伤时腓骨长肌的活动。
方法：本研究纳入了22例功能性踝关节不稳（FAI）患者（男12例，女10例）和16例健康受试者（男8例，女8例）。所有受试者都在定制的倾斜平台上行走，该平台提供30°倒置（IV）以模仿脚踝扭伤的IV。我们收集了6次有或没有踝关节支撑的FAI患者和正常对照组的运动学和表面肌电图数据。
结果：无支撑FAI组的最大IV角度和平均IV速度明显高于对照组（P<0.001）。有支具的FAI组显示最大IV角和平均IV速度明显低于无支具的FAI组（P<.001）；该组也显示出最大外旋（ER）角和平均ER速度明显高于有支具的FAI组（P<.001）和对照组（P<.001）。带支撑组的FAI显示平均EMGPrep显着降低（P=.047），EMGTilt(P=.037),腓骨后倾（P=.004）比无支撑组的FAI。
结论：在FAI患者踝关节扭伤时，踝关节支具可有效降低IV角及其速度，增加ER角及其相应的速度。它还可以减少踝关节扭伤时腓骨长肌的活动。
