Differential contributions of the left and right inferior parietal lobules to number processing
Differential contributions of the left and right inferior parietal lobules to number processing
复制标题
DOI：
10.1162/089892999563689
复制
发表时间：
1999-11-01
影响因子：
3.2
通讯作者：
Dehaene, S
中科院分区：
文献类型：
--
作者：
Chochon, F;Cohen, L;Dehaene, S
我们用3特斯拉的功能磁共振成像测量大脑激活，同时8名健康志愿者进行各种已知在脑损伤患者中可分离的数字处理任务：命名，比较，乘法或减法个位数。结果显示，激活的电路，包括双边顶内，前额叶，前扣带回组件。该回路的延伸和偏侧化受任务要求的调节。顶叶内和前额叶激活是比较任务中的右半球和乘法任务中的左半球更重要，并在减法任务中强烈双边。因此，背顶叶通路的部分不同的大脑回路是不同的算术运算的基础。
We measured cerebral activation with functional magnetic resonance imaging at 3 Tesla while eight healthy volunteers performed various number processing tasks known to be dissociable in brain-lesioned patients: naming, comparing, multiplying, or subtracting single digits. The results revealed the activation of a circuit comprising bilateral intraparietal, prefrontal, and anterior cingulate components. The extension and lateralization of this circuit was modulated by task demands. The intraparietal and prefrontal activation was more important in the right hemisphere during the comparison task and in the left hemisphere during the multiplication task and was intensely bilateral during the subtraction task. Thus, partially distinct cerebral circuits with the dorsal parietal pathway underlie distinct arithmetic operations.