**5. Conclusion**

We conclude our numerical BOLD fMRI simulations by the following findings (albeit quali‐ tative):


Overall, the numerical simulations on BOLD fMRI allow us to look into the insights of a singlevoxel signal, a multivoxel image, and a video of brain functional BOLD activity with respect to various parameter settings. The finding in source-image mismatch inspires us to seek for the underlying magnetic source of BOLD fMRI for more accurate brain functional mapping. The finding in the noise sensitiveness of task-correlated fmap raises a caveat to the correlationbased functional mapping.
