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A) Average sample entropy per region across the brain. Regions are defined by the Schaefer 400 parcellation and 16 subcortical regions & 3 cerebellum regions from the Human Connectome Project. Red indicates the highest levels of SampEn observed, and purple indicates the lowest. B) Regions with SampEn above (red) and below (blue) the average SampEn across the brain for people who smoke pre-rTMS stimulation.
