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      Parallel amygdala and inferotemporal activation reflect emotional intensity and fear relevance.

      1 , , ,
      NeuroImage
      Elsevier BV

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          Abstract

          Much research demonstrates that emotional stimuli prompt increased amygdala and visual cortical activation. Here we measure functional activity in the visual cortex and amygdala with fMRI while selected fearful and control participants view a range of neutral, emotionally arousing, and fear-relevant pictures. BOLD signal in the amygdala and inferotemporal visual cortex closely covaried during emotional picture viewing, increasing systematically with rated picture arousal. Furthermore, fearful individuals reacting to specific fear cues show parallel, heightened activation in these two structures compared with non-fearful controls. The findings suggest an individually-sensitive, positive linear relationship between the arousing quality of visual stimuli and activation in amygdala and ventral visual cortex, supporting the hypothesized functional connectivity described in the animal model.

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          Author and article information

          Journal
          Neuroimage
          NeuroImage
          Elsevier BV
          1053-8119
          1053-8119
          Feb 15 2005
          : 24
          : 4
          Affiliations
          [1 ] NIMH Center for the Study of Emotion and Attention, University of Florida, PO Box 100165 HSC, Gainesville, FL 32610, USA. sabat@ufl.edu
          Article
          S1053-8119(04)00769-4
          10.1016/j.neuroimage.2004.12.015
          15670706
          47edc0bd-75de-4bff-9c0c-63e814112f1a
          History

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