Powell Meaghan R, Powden Cameron J, Houston Megan N, Hoch Matthew C
*Department of Human Movement Sciences, College of Education, Old Dominion University, Norfolk, Virginia; and †School of Physical Therapy and Athletic Training, College of Health Sciences, Old Dominion University, Norfolk, Virginia.
Clin J Sport Med. 2014 Nov;24(6):490-6. doi: 10.1097/JSM.0000000000000074.
To determine if plantar cutaneous sensation and postural control differ between individuals with and without chronic ankle instability (CAI).
Case-control.
Laboratory.
Ten subjects with CAI and 10 subjects with no ankle sprain history participated.
Light touch was evaluated at 3 sites (heel, base of fifth metatarsal, and head of first metatarsal) on the plantar aspect of the foot using Semmes-Weinstein Monofilaments (SWMs). Postural control was assessed using the single leg firm and foam conditions of the Balance Error Scoring System (BESS) and during eyes open and eyes closed static postural control on a force plate.
Semmes-Weinstein Monofilament detection thresholds, BESS errors, and the mean of time-to-boundary (TTB) minima (TTB-mean) and the SD of TTB minima (TTB-SD) in the anterior-posterior (AP) and medial-lateral directions were evaluated for each subject.
Subjects with CAI demonstrated increased SWM detection thresholds at the heel (P = 0.009), head of the first (P = 0.01), and base of the fifth metatarsal (P < 0.001) and postural control deficits on the BESS firm (P = 0.04) and foam (P = 0.001) conditions and with eyes open TTB-mean AP (P = 0.007) and TTB-SD AP (P = 0.02). When combining groups, a negative moderate correlation was observed between the base of the fifth metatarsal detection threshold and eyes open TTB-mean AP (r = -0.50; P = 0.03).
Light touch and postural control deficits were observed in individuals with CAI. The correlation between light touch over the base of the fifth metatarsal and eyes open TTB-mean AP suggests that there may be a relevant relationship between these measures.
Individuals with CAI demonstrated deficits in light touch over the plantar aspect of the foot. The relationship between base of the fifth metatarsal sensation and TTB-mean AP may provide a starting point to link plantar cutaneous sensory deficits to changes in other aspects of sensorimotor function.
确定慢性踝关节不稳（CAI）患者与非慢性踝关节不稳患者之间足底皮肤感觉和姿势控制是否存在差异。
病例对照研究。
实验室。
10名CAI患者和10名无踝关节扭伤史的受试者参与研究。
使用Semmes-Weinstein单丝（SWMs）评估足部足底3个部位（足跟、第五跖骨基部和第一跖骨头）的轻触觉。使用平衡误差评分系统（BESS）的单腿稳定和泡沫条件以及在测力板上睁眼和闭眼静态姿势控制期间评估姿势控制。
评估每位受试者的Semmes-Weinstein单丝检测阈值、BESS误差以及前后（AP）和内外侧方向的边界时间（TTB）最小值均值（TTB-mean）和TTB最小值标准差（TTB-SD）。
CAI患者在足跟（P = 0.009）、第一跖骨头（P = 0.01）和第五跖骨基部（P < 0.001）处的SWM检测阈值升高，在BESS稳定（P = 0.04）和泡沫（P = 0.001）条件下以及睁眼时的TTB-mean AP（P = 0.007）和TTB-SD AP（P = 0.02）存在姿势控制缺陷。合并组时，第五跖骨基部检测阈值与睁眼时的TTB-mean AP之间观察到负中度相关性（r = -0.50；P = 0.03）。
在CAI患者中观察到轻触觉和姿势控制缺陷。第五跖骨基部轻触觉与睁眼时TTB-mean AP之间的相关性表明这些测量之间可能存在相关关系。
CAI患者在足部足底轻触觉方面存在缺陷。第五跖骨感觉与TTB-mean AP之间的关系可能为将足底皮肤感觉缺陷与感觉运动功能其他方面的变化联系起来提供一个起点。
