Research suggests that structural and functional changes within the brain are associated with chronic low back pain, and these cortical alterations might contribute to impaired sensorimotor control of the trunk and hips in this population. However, linking sensorimotor brain changes with altered movement of the trunk and hips during task-based neuroimaging presents significant challenges. An MRI-safe pressure measurement system was developed to ensure proper task completion during neuroimaging by capturing movement patterns of the trunk (sensors under the lower back) and hips (sensors embedded in the foam roll under the knees). Pressure changes were measured outside of the scanner by digital differential pressure sensors to capture time-series data and analog pressure gauges for real-time determination of task performance occurring within an MRI bore during brain imaging. This study examined the concurrent validity of air pressure changes between the digital and analog sensors. The digital and analog data were compared in 23 participants during the performance of modified bilateral and unilateral right and left hip bridges. Spearman’s correlations were calculated for each sensor during the three bridging tasks and showed high positive correlations, indicating that over 87% of pressure change from the analog gauge can be explained by the pressure from the digital sensor. Bland-Altman plots showed no bias and mean differences were under three mmHg. This pressure system improves the rigor of future studies by validating the digital data from the system and increasing the capabilities of capturing lumbopelvic task performance occurring inside the scanner bore.

中文翻译：

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与 MRI 兼容的腰盆运动测量系统可在神经成像期间验证和捕获任务表现

研究表明，大脑内的结构和功能变化与慢性腰痛有关，这些皮质变化可能会导致该人群躯干和臀部的感觉运动控制受损。然而，在基于任务的神经成像过程中，将感觉运动大脑的变化与躯干和臀部的运动改变联系起来面临着巨大的挑战。开发了一种 MRI 安全压力测量系统，通过捕获躯干（下背部下方的传感器）和臀部（嵌入膝盖下方泡沫轴中的传感器）的运动模式，确保神经成像期间正确完成任务。通过数字差压传感器在扫描仪外部测量压力变化，以捕获时间序列数据，并通过模拟压力计实时确定大脑成像期间 MRI 孔内发生的任务性能。这项研究检查了数字和模拟传感器之间气压变化的并发有效性。对 23 名参与者进行改良双侧和单侧左右髋桥的数字和模拟数据进行了比较。在三个桥接任务期间计算了每个传感器的 Spearman 相关性，并显示出较高的正相关性，表明模拟压力表 87% 以上的压力变化可以用数字传感器的压力来解释。 Bland-Altman 图显示没有偏差，平均差异低于 3 mmHg。该压力系统通过验证系统的数字数据并提高捕获扫描仪孔内发生的腰盆腔任务表现的能力，提高了未来研究的严谨性。