A general characteristic of the motor system is that people can perform some learned movements automatically. The underlying neural correlates of automatic movement have been investigated, but are not fully understood. In the present study, in order to investigate the brain activities contributing to the phenomenon, we use a specially designed dual task paradigm and functional magnetic resonance imaging (fMRI) technique. Forty healthy adult subjects are asked to perform motor tasks (squeezing of hand or sequential movement of fingers) while listening to an auditory distraction task, or to execute two different motor tasks simultaneously. fMRI is obtained during their performance of these tasks. By analyzing fMRI results, we will explore the brain regions especially devoted to the automatic movements.