The General Linear Model (GLM) used in task-fMRI relates activated brain areas to extrinsic task conditions. The translation of resulting neural activation into a hemodynamic response is commonly approximated with a linear convolution model using a hemodynamic response function (HRF). There are two major limitations in GLM analysis. https://www.roneverhart.com/Bonbuz-Slowburn-Non-Alcoholic-Spirit-750ml/