Exposure to subliminal arousing stimuli induces robust activation in the amygdala, hippocampus, anterior cingulate, insular cortex and primary visual cortex: A systematic meta-analysis of fMRI studies. - Samantha J. Brooks; V. Savov; E. Allzén; Christian Benedict; Robert Fredriksson; Helgi B. Schiöth (NeuroImage, 2012)