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Related Experiment Video

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Experimental trauma rapidly modifies functional connectivity.

Geraldine Gvozdanovic1,2,3, Erich Seifritz4,5, Philipp Stämpfli4

  • 1Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric Hospital, University of Zurich, Zurich, Switzerland. geraldine.gvozdanovic@uzh.ch.

Brain Imaging and Behavior
|September 29, 2020
PubMed
Summary
This summary is machine-generated.

Experiencing trauma rapidly alters brain connectivity in memory regions, impacting emotional responses. These changes may serve as early biomarkers for post-traumatic stress disorder (PTSD) risk.

Keywords:
ConnectivityResting state fMRITraumaTrauma film paradigm

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Psychology

Background:

  • Traumatic events can trigger emotional, cognitive, and physiological responses.
  • Post-traumatic stress disorder (PTSD) is a psychiatric syndrome resulting from trauma exposure.
  • The onset and nature of trauma-induced functional connectivity changes remain unclear.

Purpose of the Study:

  • To investigate functional connectivity changes at rest immediately following experimental trauma exposure.
  • To identify specific brain regions and networks affected by acute trauma.
  • To explore the relationship between functional connectivity changes and emotional responses.

Main Methods:

  • Seventy-three healthy subjects participated in the study.
  • Participants underwent resting-state functional magnetic resonance imaging (fMRI) before and after watching either a trauma or a control film.
  • Seed-based analyses were used to examine functional connectivity.

Main Results:

  • Trauma exposure led to decreased functional connectivity between the amygdala and middle temporal gyrus.
  • Increased functional connectivity was observed between the hippocampus and precuneus following trauma.
  • Trauma-related increases in heart rate were noted, and amygdala-middle temporal gyrus connectivity predicted emotional valence.

Conclusions:

  • Rapid, trauma-related functional connectivity changes occur in memory-associated brain regions at rest.
  • These alterations are linked to emotions evoked by the traumatic experience.
  • Findings suggest potential early predictive biomarkers for PTSD, indicating a need for timely preventive interventions.