A- Finger Tapping Task, FTT. B- Experimental groups. Subjects were scanned during training and were divided in two groups according to the sleep condition on the first post-training night (SG: Sleep Group, SDG: Sleep Deprived Group). All the subjects were retested in the scanner three days later. C- Experimental design. Training and retest sessions consisted of 14 and 20 blocks respectively, each block consisting in 60 key presses. The untrained (U) sequence was proposed during retest, mixed with trained (T) sequence.