title: Inverse amygdala and medial prefrontal cortex responses to surprised faces.
abstract: Here we show inverse fMRI activation patterns in amygdala and medial prefrontal cortex (mPFC) depending upon whether subjects interpreted surprised facial expressions positively or negatively. More negative interpretations of surprised faces were associated with greater signal changes in the right ventral amygdala, while more positive interpretations were associated with greater signal changes in the ventral mPFC. Accordingly, signal change within these two areas was inversely correlated. Thus, individual differences in the judgment of surprised faces are related to a systematic inverse relationship between amygdala and mPFC activity, a circuitry that the animal literature suggests is critical to the assessment of stimuli that predict potential positive vs negative outcomes.
authors.affiliation: W M Keck Laboratory for Functional Brain Imaging, Department of Psychiatry, University of Wisconsin-Madison, 53705, USA.
authors.forename: Hackjin
authors.initials: H
authors.lastname: Kim
authors.forename: Leah H
authors.initials: LH
authors.lastname: Somerville
authors.forename: Tom
authors.initials: T
authors.lastname: Johnstone
authors.forename: Andrew L
authors.initials: AL
authors.lastname: Alexander
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Whalen
mesh_terms: D000328:Adult; D000679:Amygdala / Q000502:physiology*; D019260:Expressed Emotion / Q000502:physiology*; D005149:Facial Expression; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D010775:Photic Stimulation / Q000379:methods*; D017397:Prefrontal Cortex / Q000502:physiology*