Essentials of Functional MRI is explained from the basic theory underlying magnetic resonance imaging. This includes how it can be used to detect dynamic variations in neural activity to become “functional” MRI, and how fMRI can be used for a variety of applications. The reader will gain an understanding of how fMRI is currently used, its limitations, and how it is still developing. This is achieved by explaining the core concepts and building on them to explain how fMRI data are ...