FIG 1. Comparison of the block-design method and the single-event method for one participant.

A, Analyzed by the block-design method, the finger task shows activation in the sensorimotor cortex and (in an adjacent section that is not illustrated) in the midline in the presumed SMA.

B, Analyzed by the single-event method, the finger task shows activation in the sensorimotor cortex, SMA, and parietal and frontal lobes, which was classified as nonspecific in this study.

C, Analyzed by the block-design method, the tongue task shows activation in the inferior sensorimotor cortex on the convexity and in the SMA in the midline. Activation along the inner table over the left parietal lobe is likely motion artifact.

D, Analyzed by the single-event method, the tongue task produces activation in the SMA and sensorimotor cortex and in frontal and parietal regions. The motion artifact is less evident.