Kerr Robin, Arnold Graham P, Drew Tim S, Cochrane Lynda A, Abboud Rami J
Institution of Motion Analysis & Research, Orthopaedic & Trauma Surgery, TORT Centre, Ninewells Hospital & Medical School, University of Dundee, Dundee DD1 9SY, Scotland, United Kingdom.
J Orthop Res. 2009 Mar;27(3):318-24. doi: 10.1002/jor.20744.
Lateral ankle ligaments are injured by hyperinversion of the foot. Foot position is controlled by the lower limb muscles. Awareness of foot position is impaired by wearing shoes. We aimed to determine the influence of wearing shoes upon muscle activity. Sixty-two healthy subjects underwent the same measurements, barefoot and with standardized shoes in a random order. Electromyography (EMG) was recorded from the peroneus longus muscle in response to sudden and unanticipated inversion of the ipsilateral foot. Following foot inversion, the EMG signal showed an initial peak muscle contraction followed by a sustained smaller contraction. Both changes were significantly greater in shoes compared to the barefoot condition for all tested degrees of inversion. Muscle contraction following sudden inversion of the foot was significantly greater when wearing shoes. This greater muscular contraction may be an intrinsic mechanism to oppose the increased moment created by the inverted foot/shoe condition, and hence, may counter balance the increased tendency to injure the lateral ankle ligaments created by wearing shoes.
外侧踝关节韧带因足部过度内翻而受伤。足部位置由下肢肌肉控制。穿鞋会损害对足部位置的感知。我们旨在确定穿鞋对肌肉活动的影响。62名健康受试者以随机顺序分别在赤足和穿着标准鞋子的情况下接受相同测量。记录了在同侧足部突然意外内翻时腓骨长肌的肌电图（EMG）。足部内翻后，EMG信号显示出最初的峰值肌肉收缩，随后是持续的较小收缩。在所有测试的内翻程度下，与赤足情况相比，穿鞋时这两种变化都显著更大。突然足部内翻后的肌肉收缩在穿鞋时显著更大。这种更大的肌肉收缩可能是一种内在机制，以对抗由内翻的足部/鞋子状况产生的增加的力矩，因此，可能抵消穿鞋导致的外侧踝关节韧带受伤倾向增加。
