Lehman Gregory J
Department of Graduate Studies, Canadian Memorial Chiropractic College, Toronto, ON, Canada.
Chiropr Osteopat. 2006 Feb 27;14:4. doi: 10.1186/1746-1340-14-4.
BACKGROUND AND CASE PRESENTATION: The prone leg extension (PLE) is commonly used to identify dysfunction of muscle recruitment patterns. The prone leg extension is theorized to identify proximal muscle disturbances which are a result of distal injury or dysfunction (i.e. an ankle sprain). This case study compares the trunk and hip muscle (bilateral lower erector spine, ipsilateral hamstring and ipsilateral gluteus maximus) timing during a PLE of a 27 year old female runner during a healthy state (pre ankle sprain) and 2 and 8 weeks post ankle sprain.
The gluteus maximus muscle onsets at 8 weeks post injury appeared to occur earlier compared with 2 weeks post injury. The Right Erector Spinae at 8 weeks post injury was also active earlier compared with the participant's non-injured state. A large degree of variability can be noted within trials on the same day for all muscle groups.
An acute ankle injury did not result in a delay in gluteus maximus muscle activation. The utility of the prone leg extension as a clinical and functional test is questionable due to the normal variability seen during the test and our current inability to determine what is normal and what is dysfunctional.
背景与病例介绍：俯卧腿伸展（PLE）常用于识别肌肉募集模式的功能障碍。俯卧腿伸展的理论依据是识别由远端损伤或功能障碍（即脚踝扭伤）导致的近端肌肉紊乱。本病例研究比较了一名27岁女性跑步者在健康状态（脚踝扭伤前）以及脚踝扭伤后2周和8周时进行俯卧腿伸展过程中躯干和髋部肌肉（双侧下竖脊肌、同侧腘绳肌和同侧臀大肌）的时机。
与受伤后2周相比，受伤后8周臀大肌的起始时间似乎更早。受伤后8周时右侧竖脊肌与参与者未受伤状态相比也更早激活。在同一天的试验中，所有肌肉群都存在很大程度的变异性。
急性脚踝损伤并未导致臀大肌激活延迟。由于在测试中观察到正常变异性以及我们目前无法确定什么是正常的、什么是功能障碍的，俯卧腿伸展作为临床和功能测试的效用值得怀疑。
