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Related Experiment Videos

Does stress damage the brain?

J D Bremner1

  • 1Department of Diagnostic Radiology, Yale University School of Medicine, Yale Psychiatric Institute, New Haven, CT 06520, USA.

Biological Psychiatry
|April 15, 1999
PubMed
Summary

Traumatic stress can damage the hippocampus, a key brain area for memory. This damage, seen in PTSD patients and abuse survivors, leads to memory deficits and reduced hippocampal volume.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Neuroimaging

Background:

  • Stress is known to cause hippocampal damage and memory deficits in animals.
  • The hippocampus is crucial for learning and memory.
  • Glucocorticoids and serotonin are implicated in stress-induced hippocampal atrophy.

Purpose of the Study:

  • To investigate the long-term effects of traumatic stress on hippocampal structure and function in humans.
  • To examine the relationship between hippocampal volume, memory deficits, and history of trauma.

Main Methods:

  • Neuropsychological testing to assess memory function.
  • Magnetic resonance imaging (MRI) to measure hippocampal volume.
  • Study population included combat veterans with PTSD and victims of childhood abuse.

Main Results:

  • Patients with PTSD and childhood abuse exhibited deficits in hippocampal function.
  • Reduced hippocampal volume was observed in both combat veterans and childhood abuse survivors.
  • In combat veterans, smaller hippocampal volume correlated with poorer verbal memory performance.

Conclusions:

  • Traumatic stressors can induce lasting structural and functional changes in the human hippocampus.
  • Hippocampal volume reduction is a potential biomarker for memory impairments associated with trauma.
  • These findings highlight the significant impact of trauma on brain health.

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