Fig. 1.

PRISMA flowchart of the literature review and screening process to select human fMRI or PET studies of emotion. Included studies had to report data from healthy adult subjects with whole brain coverage using basic subtraction contrasts with coordinates reported in standard space. *Additionally filtered records automatically for non-relevant topics including “rodents,” “gene expression,” “astronomy,” “drama,” and non-English reports. ROI, region of interest; ICA, independent components analysis; MVPA, multivariate pattern analyses