Sequential hemodynamic activation of motor areas and the draining veins during finger movements revealed by cross‐correlation between signals from fMRI
Sequential hemodynamic activation of motor areas and the draining veins during finger movements revealed by cross‐correlation between signals from fMRI
复制标题
通过功能磁共振成像信号之间的互相关揭示手指运动过程中运动区和引流静脉的顺序血流动力学激活
DOI：
10.1097/00001756-199806220-00010
复制
发表时间：
1998
期刊：
影响因子：
1.7
通讯作者：
K. Kawano
中科院分区：
文献类型：
--
作者：
K. Kansaku;S. Kitazawa;K. Kawano
采用功能磁共振成像技术，以1 s的重复时间测量视觉触发手指对立任务时人体辅助运动区（SMA）、初级运动皮层（M1）和运动皮层引流静脉的活动。通过将M1信号序列与SMA和引流静脉信号序列直接交叉相关，并借助赤池信息准则进行多项式拟合，揭示了这些区域的连续血流动力学激活。我们成功地检测到SMA和M1的激活之间大约有0.5秒的延迟，M1和它的引流静脉的激活之间有近1.3秒的延迟。功能磁共振成像和数据分析技术的新组合已经获得了与之前使用更短的功能磁共振成像重复时间（100-200毫秒）的研究相当的时间分辨率。
ACTIVITY in the human supplementary motor area (SMA), primary motor cortex (M1), and the draining vein of the motor cortex during a visually triggered finger opposition task was measured by functional magnetic resonance imaging with a repetition time of 1 s. Sequential hemodynamic activation in these areas was revealed by cross-correlating a signal sequence in M1 directly with signal sequences from SMA and the draining vein, and applying polynomial fitting with the aid of Akaike's information criterion. We succeeded in detecting a time delay of approximately 0.5 s between the activations of SMA and M1, and a delay of nearly 1.3 s between the activations of M1 and its draining vein. The new combination of fMRI and data analysis techniques has attained a time resolution comparable to those in preceding studies that used shorter fMRI repetition times of 100–200 ms.