Self-paced frequency of a simple motor task and brain activation: An fMRI study in healthy subjects using an on-line monitor device. - Stefano Diciotti; Cinzia Gavazzi; Riccardo Della Nave; Enrico Boni; Andrea Ginestroni; Lorenzo Paoli; Paolo Cecchi; Nicola De Stefano; Mario Mascalchi (NeuroImage, 2007)