Surface electromyographic recording and data analysis
We collected electromyographic data using a data acquisition system (biopac mp100wswb) and a bagnoli electromyography system .
The skin was cleansed with rubbing alcohol , and disposable Ag-AgC1 surface electrodes were positioned at an interelectrode distance of 2 cm .
The reference electrode was attached to the styloid process of the ulna on the dominant upper extremity .
Electromyographic data were collected for the following muscles on the same side as the dominant lower extremity : quadratus lumborum (～ 4cm lateral form the vertebral ridge or belly of the erector spinae muscle , and at a slightly oblique angle at half the distance between the 12th rib and the iliac crest ) , gluteus medius (parallel to the muscle fibers , over the proximal one third of the distance between the iliac crest and the greater trochanter ) , external oblique (on the inferior edge of the 8th rib , superolateral to the costal margin ) , internal oblique (in the horizontal plane , 2cm medial to the anterior superior iliac spine ) , rectus abdominis ( 2cm lateral to the umbricus ) , and multifidus ( parallel to the muscle fibers , 2cm lateral to the midline running through the L5 spinal process )
We amplified and digitized the electromyographic signals with AcqKnowledge software ( version 3.7.2 ) .
Bandpass ( 20-450 hz ) and bandstop filters (60 hz ) were used .
The raw data were processed into the root mean square ( RMS ) and were converted to ASCII files for analysis .
For normalization , the mean RMS of 3 trials of maximal voluntary isometric contraction ( MVIC ) was calculated for each muscle .
The manual muscle testing position was used , as described by Kendall et al .
The electromyographic signals collected during hip abduction were expressed as a percentage of the calculated mean RMS of the MVIC (% MVIC)
- 1 0 年前最佳解答
我們收集了electromyographic 資料使用資料採集系統(biopac mp100wswb) 並且bagnoli 肌動電流術系統。
Electromyographic 資料被收集了為以下肌肉在邊和統治更低的肢一樣: quadratus lumborum (? 4cm 側面形式設立者spinae 肌肉的椎骨土坎或腹部, 和在從一半的一個輕微地斜角距離在第12 塊肋骨和腸骨冠之間), gluteus medius (平行對肌肉纖維, 在距離的接近三分之一在腸骨冠和更加巨大的trochanter 之間), 外在傾斜(在第8 塊肋骨的下等邊緣, superolateral 對costal 邊際), 內部傾斜(在平面, 2cm 中間對先前優越腸骨脊椎), rectus abdominis (2cm 側面對umbricus), 和multifidus (平行對肌肉纖維, 2cm 側面對midline 運行通過L5 脊髓過程)
我們放大了和數字化了electromyographic 信號以AcqKnowledge 軟體(版本3.7.2) 。
帶通(20-450 赫茲) 並且bandstop 過濾器(60 赫茲) 被使用了。
為正常化, 最大的義務等量收縮3 次試驗卑鄙RMS
手工肌肉測試的位置被使用了, 如所描述由Kendall 等。
electromyographic 信號被收集在hip 綁架期間被表示為故意的卑鄙RMS 的百分比MVIC (% MVIC)