A model of the Blood Oxygenation Level Dependent Haemodynamic Response Function (BOLD HRF) has now been added to the toolbox. It simulates the brain signal observed in functional Magnetic Resonance Imaging (fMRI). Specifically, it computes the BOLD response to simulated neuronal activity within a region of the brain about the size of an fMRI voxel. Links to the code are published in the newsletter.