Visualizing Cortical Activation During Mental Substraction And Multiplication Through Vision With Functional MRI

Article Title:Visualizing Cortical Activation during Mental Substraction and Multiplication through vision with Functional MRI .ObjectiveBy using functional magnetic resonance imaging (fMRI),to examine brain areas involved in calculation,and to compare these areas between mental substraction and multiplication.MethodsThirteen volunteers (five women and eight men ;age 20-30 years, right handed) were subjected to this study. Every subject performed the two tests of substraction and multiplication in the form of block-design through vision.The fMRI data was postprecessed using SPM99 to reveal the activated cortex.ResultsIn substraction ,the left MFG,IFG,SPL,IPL,AG,STG, the right MFG, SPL, IPL , bilateral visual association cortex and cerebellum wereactivated.In multiplication, the left SFG, MFG> IFG> SPL> AG, the rightSPL, PCG, bilateral visual association cortex were activated.Conclusion1 .During mental substraction,the bilateral pre-frontal and parietal cortexsare the primary activated areas.2. During mental multiplication,bilateral parietal cortexs and left frontal are major activity areas.3. The left brain semantic recruit -. left temporal > visual association cortex and cerebellum participate the processing of number manipulation. 4.Partly different circuit loops of brain constitute the foundation of different arithemetic.