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The peak BOLD signal change in the right primary olfactory cortex (POC) (a) and left POC (b) responding to the odor-sniffing events was significantly stronger than that responding to the odorless-sniffing events at 5, 7, and 9s after the odor onset (paired t test, n = 43, *p < .05; **p < .01). All statistical parameter maps from SPM8 were overlaid on a standard anatomical template image (ch2better.nii) using MRIcron (http://www.mccauslandcenter.sc.edu/mricro/mricron).
