引导fMRI运动任务中人类头部运动的跟踪与分析

Ningbo Yu, C. Hollnagel, Peter Wolf, W. Murr, A. Blickenstorfer, S. Kollias, R. Riener
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引用次数: 6

摘要

在这项工作中,我们通过功能性磁共振成像(fMRI)研究了上肢运动任务中人类头部的运动。实验是在模拟的核磁共振实验台上进行的。研究了右臂在三种不同速度下的尾颅、左右和前后方向的三种线性运动,以及肩、肘、腕的单关节运动。由高精度运动跟踪系统跟踪的光学标记用于检测头部和手臂的运动。在每项任务中,头部的运动方向主要是右尾-后到左颅-前,与右肩关节到头部的直线平行。未观察到主旋转轴。头部的平移和旋转运动分别为1.7 ~ 8.4 mm和0.15°~ 0.96°。然后我们使用一种特殊的头部固定装置来稳定头部,并重复所有的实验。平移和旋转头部运动被显著抑制了78%和73%,范围为0.3 ~ 2.4 mm和0.04°。∼0.39°
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Tracking and analysis of human head motion during Guided fMRI motor tasks
In this work, we studied human head motions during upper extremity motor task, conducted in functional magnetic resonance imaging (fMRI) studies. The experiments were performed on a mock up of the MRI bench. Three kinds of linear movements in the caudal-cranial, left-right and anterior-posterior directions, a reaching movement as well as single joint movements at shoulder, elbow and wrist, were investigated at three different speeds with the right arm. Optical markers tracked by a high-precision motion tracking system were used to detect head and arm movements. For each task, the head moved principally in the direction of right-caudal-posterior to left-cranial-anterior, parallel to the line from the right shoulder joint to the head. No principal rotation axis was observed. The translational and rotational head motions were 1.7 ∼ 8.4 mm and 0.15° ∼ 0.96°, respectively. We then applied a special head fixation to stabilize the head, and repeated all the experiments. The translational and rotational head motions were significantly suppressed by 78% and 73%, to the range of 0.3 ∼ 2.4 mm and 0.04°. ∼ 0.39°
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