A functional magnetic resonance imaging study of amygdala and medial prefrontal cortex responses to overtly presented fearful faces in posttraumatic stress disorder (cambridge.org)
Images of fearful faces produced normal levels of activation in the amygdala, which responds to fear, in both groups. (newscientist.com)
This hypothesis receives support from evidence that showing neurotic subjects images of fearful faces triggers an exaggerated response in the amygdala, a brain region that has been linked to fearful emotion. (nautil.us)