School of Clinical Sciences, Faculty of Health, Queensland University of Technology (QUT), Victoria Park Road, Kelvin Grove QLD 4059, Australia.
BMC Med Imaging. 2013 Nov 19;13:38. doi: 10.1186/1471-2342-13-38.
No study relating the changes obtained in the architecture of erector spinae (ES) muscle were registered with ultrasound and different intensities of muscle contraction recorded by surface EMG (electromyography) on the ES muscle was found. The aim of this study was analyse the relationship in the response of the ES muscle during isometric moderate and light lumbar isometric extension considering architecture and functional muscle variables.
Cross-sectional study. 46 subjects (52% men) with a group mean age of 30.4 (±7.78). The participants developed isometric lumbar extension while performing moderate and low isometric trunk and hip extension in a sitting position with hips flexed 90 degrees and the lumbar spine in neutral position. During these measurements, electromyography recordings and ultrasound images were taken bilaterally. Bilaterally pennation angle, muscle thickness, torque and muscle activation were measured. This study was developed at the human movement analysis laboratory of the Health Science Faculty of the University of Malaga (Spain).
Strong and moderate correlations were found at moderate and low intensities contraction between the variable of the same intensity, with correlation values ranging from 0.726 (Torque Moderate - EMG Left Moderate) to 0.923 (Angle Left Light - Angle Right Light) (p < 0.001). This correlation is observed between the variables that describe the same intensity of contraction, showing a poor correlation between variables of different intensities.
There is a strong relationship between architecture and function variables of ES muscle when describe an isometric lumbar extension at light or moderate intensity.
没有研究记录过竖脊肌（ES）肌肉结构的变化，也没有记录过不同强度的肌肉收缩与表面肌电图（肌电图）之间的关系。本研究旨在分析在考虑 ES 肌肉结构和功能变量的情况下，等长中度和轻度腰椎等长伸展时 ES 肌肉的反应之间的关系。
这是一项横断面研究。共纳入 46 名受试者（52%为男性），平均年龄为 30.4（±7.78）岁。参与者在坐姿下进行等长腰椎伸展，同时进行中度和轻度的等长躯干和髋关节伸展，髋关节弯曲 90 度，腰椎处于中立位。在这些测量过程中，对双侧进行肌电图记录和超声图像采集。双侧羽毛角、肌肉厚度、扭矩和肌肉激活度均进行了测量。本研究在西班牙马拉加健康科学学院人体运动分析实验室进行。
在中度和轻度收缩强度下，同一强度的变量之间存在强相关和中度相关，相关值范围从 0.726（中度扭矩-左侧中度肌电图）到 0.923（左侧轻度角度-右侧轻度角度）（p<0.001）。这种相关性在描述同一收缩强度的变量之间观察到，不同强度的变量之间相关性较差。
在描述轻或中度等长腰椎伸展时，ES 肌肉的结构和功能变量之间存在很强的关系。
