Engelina S, Antonios T, Robertson C J, Killingback A, Adds P J
Division of Biomedical Sciences (Anatomy), St. George's, University of London, SW17 0RE, United Kingdom.
Clin Anat. 2014 Oct;27(7):1076-84. doi: 10.1002/ca.22413. Epub 2014 May 5.
There is thought to be a link between vastus medialis oblique (VMO) architecture and patellofemoral pain syndrome (PFPS). Historical data are largely derived from older populations, whereas PFPS commonly affects younger populations. The aim of this study was to gather data on VMO architecture in young asymptomatic adults, to provide baseline values for comparison with symptomatic sufferers. VMO maximum fiber angle and insertion ratio were measured with ultrasound. The insertion ratio represents the proportion (%) of the patella which has the muscle fibers attaching to its medial border. Eighty knees from 40 healthy young subjects (18 males, 22 females, and age 20-30) were assessed. Individual Tegner scores were recorded to assess participants' level of physical activity. Results were compared with data in the literature for PFPS sufferers and normal older individuals. Mean fiber angle and insertion ratio were 56.6° and 57.8%, respectively. There was no significant difference between age groups. The insertion ratio was higher among females (61.2% F:53.6% M). There was some evidence of increased fiber angle and decreased insertion ratio with increased Tegner score. There was some overlap in fiber angle between healthy knees in this study and values reported elsewhere for pathological knees. VMO fiber angle and insertion ratio are not age-related. The overlap in fiber angle values between healthy and pathological knees suggests that the cause of PFPS is multifactorial. An individual's VMO architecture may be affected by their physical activity level, which could have important implications for PFPS.
股内侧斜肌（VMO）的结构与髌股疼痛综合征（PFPS）之间被认为存在联系。历史数据大多来源于老年人群，而PFPS通常影响年轻人群。本研究的目的是收集年轻无症状成年人VMO结构的数据，以提供与有症状患者进行比较的基线值。通过超声测量VMO最大纤维角度和附着率。附着率表示髌骨内侧缘附着有肌纤维的比例（%）。对40名健康年轻受试者（18名男性，22名女性，年龄20 - 30岁）的80个膝关节进行了评估。记录个体的Tegner评分以评估参与者的身体活动水平。将结果与PFPS患者和正常老年个体的文献数据进行比较。平均纤维角度和附着率分别为56.6°和57.8%。年龄组之间无显著差异。女性的附着率更高（女性61.2%：男性53.6%）。有证据表明，随着Tegner评分增加，纤维角度增加而附着率降低。本研究中健康膝关节的纤维角度与其他地方报道的病理性膝关节的值存在一定重叠。VMO纤维角度和附着率与年龄无关。健康和病理性膝关节之间纤维角度值的重叠表明PFPS的病因是多因素的。个体的VMO结构可能受其身体活动水平的影响，这可能对PFPS具有重要意义。
