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Related Experiment Videos

Fear and the human amygdala

R Adolphs1, D Tranel, H Damasio

  • 1Department of Neurology, University of Iowa College of Medicine, Iowa City 52242, USA.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|September 1, 1995
PubMed
Summary
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Bilateral amygdala damage impairs fear recognition from faces, but not identity recognition. This suggests the amygdala is crucial for processing facial expressions of fear.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Previous research indicated bilateral amygdala damage impairs fear recognition from facial expressions.
  • Recognition of face identity remains intact despite bilateral amygdala damage.

Purpose of the Study:

  • To investigate if unilateral amygdala damage affects emotional expression recognition.
  • To further explore mechanisms behind impaired fear recognition in bilateral amygdala damage patients.

Main Methods:

  • Examined patients with unilateral and bilateral amygdala damage.
  • Assessed recognition of facial expressions and face identity.
  • Analyzed sensitivity to the intensity of fear in facial expressions.

Main Results:

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  • Bilateral amygdala damage, not unilateral, impairs processing of fearful facial expressions.
  • Impairment is linked to reduced sensitivity to the intensity of fear.
  • Confirmed double dissociation between fear expression and face identity recognition.

Conclusions:

  • The amygdala is essential for linking visual facial expression data with the concept of fear.
  • Separate neural systems likely underlie facial expression and identity recognition.
  • The amygdala may play a role in both recognition and recall of fearful expressions.