FMRI output for the night-sleep group indicated increased activation in the right primary motor cortex/M1/Prefrontal Gyrus (contra lateral to the hand they were block tapping with), right anterior medial prefrontal lobe, right hippocampus (long-term memory, spatial memory), right ventral striatum (olfactory tubercle, nucleus accumbens), as well as regions of the cerebellum (lobules V1, V11). In the day-wake group, fMRI showed "decreased" signal activation bilaterally in the parietal cortices (integrates multiple modalities), in addition to the left insular cortex (regulation of homeostasis), left temporal pole (most anterior of temporal cortex), and the left inferior fronto-polar cortex.[1] Previous investigations have shown that signal increases indicate brain plasticity. The increased signal activity seen in M1 after sleep corresponds to increased activity in this area seen during practice; however, an individual must practice for longer periods than they would have to sleep in order to obtain the same level of M1 signal increases.