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Investigating Pain-Related Avoidance Behavior using a Robotic Arm-Reaching Paradigm
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Amygdala involvement in human avoidance, escape and approach behavior.

Michael W Schlund1, Michael F Cataldo

  • 1Department of Behavioral Psychology, Kennedy Krieger Institute, Baltimore, MD, USA. schlund@kennedykrieger.org

Neuroimage
|July 6, 2010
PubMed
Summary
This summary is machine-generated.

Chronic avoidance and escape behaviors, common in psychopathology, show heightened amygdala responses even when threats are avoided. This may explain the persistence of these coping mechanisms in clinical disorders.

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Area of Science:

  • Neuroscience
  • Psychology
  • Behavioral Science

Background:

  • Psychopathology and substance abuse often involve chronic avoidance and escape behaviors to manage internal or external threats.
  • These behaviors are ritualistic and aimed at controlling or modifying perceived dangers.

Purpose of the Study:

  • To investigate amygdala reactivity to threatening cues during avoidance, escape, and approach behaviors using functional magnetic resonance imaging (fMRI).
  • To explore how amygdala responses differ when avoidance prevents negative outcomes, escape terminates them, and approach yields rewards.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to measure brain activity.
  • Participants' amygdala reactivity was examined in response to cues associated with avoidance (preventing money loss), escape (terminating money loss), and approach (gaining money).

Main Results:

  • A common fronto-striatal-parietal network was activated by cues for avoidance, escape, and approach behaviors.
  • The amygdala showed bilateral activation to threatening cues for avoidance and escape, and also to reward cues.
  • While within-subject amygdala responses were similar across conditions, significant between-subject differences were observed.

Conclusions:

  • Heightened amygdala responses to avoidance and escape cues, even when threats are successfully managed, suggest persistent threat-related responses.
  • These findings may explain the persistence of avoidance coping in clinical disorders.
  • Further research on the link between amygdala reactivity and avoidance-escape behavior could aid in identifying individuals at risk for neuropsychiatric disorders.