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【論文摘要】哪個更有說服力：用於股四頭肌的入侵性或表面肌電圖
【論文摘要】Which is more convincing: Fine-wire or Surface EMG for Quadriceps
摘要
背景：髕骨股骨疼痛症候群（PFPS）可能是由於內側股斜肌（VMO）相對於外側股肌（VL）的延遲起動而導致的髕骨外移。在從事負重動作時，過度髕骨外移可以引致髕骨後軟骨受壓及伴隨的局部前膝疼痛。但是，上述的理論僅基於使用表面肌電圖的研究。在相關文獻中很少使用較為精準的入侵性肌電圖方法。方法：本研究同時使用入侵性和表面肌電圖記錄VMO和VL肌肉。10名健康的成人志願者（5名男性和5名女性）在站立姿勢進行抬起腳掌動作20次。平均的VMO和VL起動時間差別在記錄後被計算出來並作出作出比較。結果與結論：從表面肌電圖記錄得知，VMO和VL起動時間差別為15.6（±32.2）ms，而入侵性肌電圖記錄為1.6（±8.9）ms；因此兩者之間存在顯著差異（p <0.05）。以目前的實驗結果來說，站立時腳掌抬起動作的VMO-VL起動時間差別，受不同肌電圖的記錄方法影響。儘管表面肌電圖可作為觀察股四頭肌作為髕骨動態穩定肌的途徑，但必須注意，表面肌電圖作為PFPS的體檢方法的敏感性仍需進一步研究。
並列摘要
Introduction: Patellofemoral Pain Syndrome (PFPS) could be caused by a delayed onset of Vastus Medialis Obliquus (VMO) relative to Vastus Lateralis (VL) that leads to an excessive lateral patellar tracking. In turn, the tracking results in a strain on the retro-patellar subchondral bone and local pain during weight-bearing movements. However, the above mechanism was based on studies using surface electromyography (EMG) only. A more precise EMG method using fire-wire electrodes has been rarely used in the relevant literature. Methods: The present study using fine-wire and surface EMGs for VMO and VL muscles simultaneously; 10 healthy adult volunteers (5 males & 5 females) were requested to perform toes rising in standing posture 20 times. The averaged onset time difference of VMO and VL from fine-wire and surface EMGs were calculated and compared. Results and Conclusion: For surface EMG recording, the VMO-VL onset difference was 15.6 (±32.2) ms, while the fine-fire EMG was 1.6 (±8.9) ms; there was a significant difference between the recordings (p < 0.05). The present finding suggested that the VMO-VL onset difference when toes raising in standing was influenced by EMG methods. While surface EMG provides a window for observing the motor control of the VMO and VL as dynamic patellar stabilizers, caution must be taken that sensitivity of surface EMG onset as a physical examination tool for PFPS still requires further explorations.