Grabner Roland H, Ansari Daniel, Koschutnig Karl, Reishofer Gernot, Ebner Franz, Neuper Christa
Institute for Behavioral Sciences, Swiss Federal Institute of Technology, Zurich, Universitaetsstrasse 6, CH-8092 Zurich, Switzerland.
Neuropsychologia. 2009 Jan;47(2):604-8. doi: 10.1016/j.neuropsychologia.2008.10.013. Epub 2008 Oct 21.
While there is consistent evidence from neuropsychological and brain imaging studies for an association between the left angular gyrus and mental arithmetic, its specific role in calculation has remained poorly understood. It has been speculated that the angular gyrus mediates the retrieval of arithmetic facts during problem solving, but this hypothesis has not been directly tested. In the present functional Magnetic Resonance Imaging study comprising 28 adults, we used trial-by-trial strategy self-reports to identify brain regions underpinning different strategies in arithmetic problem solving. Analyses revealed stronger activation of the left angular gyrus while solving arithmetic problems for which participants reported fact retrieval whereas the application of procedural strategies was accompanied by widespread activation in a fronto-parietal network. These data directly link the left angular gyrus with arithmetic fact retrieval and show that strategy self-reports can be used to predict differential patterns of brain activation.
虽然神经心理学和脑成像研究有一致的证据表明左侧角回与心算之间存在关联，但其在计算中的具体作用仍未得到充分理解。有人推测，角回在解决问题过程中介导算术事实的检索，但这一假设尚未得到直接验证。在这项包含28名成年人的功能性磁共振成像研究中，我们利用逐次试验的策略自我报告来识别算术问题解决中不同策略背后的脑区。分析显示，在解决参与者报告采用事实检索策略的算术问题时，左侧角回的激活更强，而应用程序策略时则伴随着额顶叶网络的广泛激活。这些数据直接将左侧角回与算术事实检索联系起来，并表明策略自我报告可用于预测大脑激活的差异模式。
