Modulations in cerebral hemodynamics under three response requirements while solving language-based problems: a transcranial Doppler study.
Modulations in cerebral hemodynamics under three response requirements while solving language-based problems: a transcranial Doppler study.
复制标题
在解决基于语言的问题时，在三种响应要求下调节脑血流动力学：经颅多普勒研究。
DOI：
10.1016/s0028-3932(97)00037-7
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发表时间：
1997
期刊：
影响因子：
2.6
通讯作者：
McKinney,WM
中科院分区：
文献类型：
--
作者：
Varnadore,AE;Roberts,AE;McKinney,WM
该实验使用经颅多普勒超声测量大脑中动脉、前动脉和后动脉（分别为MCA、ACA和PCA）的血流速度，同时单独的大学生组（每组n = 20）解决字谜并使用目标单词的字母构建新单词，同时观看、说出或写下响应。沉默的观看要求只影响全局速度，而构建的话：速度在MCA和ACA都比在PCA。在这两种类型的问题的解决方案，在MCA比在PCA产生更快的整体速度。最后，与ACA和PCA相比，在构造单词的同时编写解决方案导致MCA的速度更快。从思考期到速度变化的时程模式显示，在思考期开始和结束时MCA速度升高，而PCA速度通常在思考期中间低于基线。这些数据表明，以语言为基础的解决问题的任务和特定的反应要求安排完成任务选择性地影响三个脑动脉的速度。
This experiment used transcranial Doppler ultrasound to measure blood flow velocity in the middle, anterior or posterior cerebral artery (MCA, ACA and PCA, respectively) while separate groups of college students (each n = 20) solved anagrams and constructed new words using letters of a target word, each while viewing, speaking or writing the responses. The silent viewing requirement affected global velocities only while constructing words: velocities in both the MCA and ACA were faster than in the PCA. Speaking the solutions during both types of problems yielded faster overall velocities in the MCA than in the PCA. Finally, writing the solutions while constructing words led to faster velocities in the MCA compared to both the ACA and PCA. Time-course patterns to velocity changes from the thinking periods showed elevations in MCA velocity at the beginning and end of the periods, while PCA velocity typically slowed below baseline in the middle of the periods. These data show that the kind of language-based problem-solving task and the specific response requirement arranged to accomplish a task selectively affected velocity in three cerebral arteries.