Everything you wanted to know about motion in fMRI (Ben Seitzman)

Relevant papers, though not required reading:

Power JD, et al. (2014). Methods to detect, characterize, adn remove motion artifact in resting state fMRI. NeuroImage 84:320-341.

Siegel JS, et al. (2014). Statistical improvements in functional magnetic resonance imaging analyses produced by censoring high-motion data points. Human Brain Mapping 35:1981-1996.