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Related Concept Videos

Post-traumatic Stress Disorder01:27

Post-traumatic Stress Disorder

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Post-traumatic stress disorder (PTSD) is a psychiatric condition that arises following exposure to traumatic events such as natural disasters, forced displacement, or severe accidents. It significantly impairs individuals' ability to cope with daily activities and disrupts their emotional and psychological equilibrium.
Symptoms and Behavioral Manifestations
A spectrum of distressing symptoms characterizes PTSD. Recurrent flashbacks, where individuals involuntarily relive traumatic events,...
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Brain Imaging01:14

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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Posttraumatic Stress Disorder: Structural Characterization with 3-T MR Imaging.

Shiguang Li1, Xiaoqi Huang1, Lingjiang Li1

  • 1From the Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital of Sichuan University, 37 Guo Xue Xiang, Chengdu, Sichuan 610041, China (S. Li, X.H., S. Lui, J.A.S, Q.G.); Department of Psychology, School of Public Administration, Sichuan University, Chengdu, Sichuan, China (Q.G.); Mental Health Institute, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China (L.L.); Department of Psychiatry, Brain Imaging Center, McLean Hospital, Harvard Medical School, Boston, Mass (F.D.); Department of Psychiatry, West China Hospital of Sichuan University, Chengdu, China (J.L.); Department of Oncology, State Key Laboratory of Biotherapy, West China Hospital of Sichuan University, Chengdu, China (F.B.); Mind Research Network, Albuquerque, NM (J.A.T.); Departments of Psychiatry and Pediatrics, University of Texas Southwestern Medical Center, Dallas, Tex (J.A.S.); Department of Radiology, the First People's Hospital of Zunyi, Guizhou, China (S.Li).

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Summary

Posttraumatic stress disorder (PTSD) is linked to brain changes in both gray and white matter. Early PTSD involves increased cortical thickness, not decreased, suggesting neuroinflammation or compensation.

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Area of Science:

  • Neuroimaging
  • Psychiatry
  • Neuroscience

Background:

  • Posttraumatic stress disorder (PTSD) is a debilitating condition following trauma.
  • Understanding the neurobiological underpinnings of PTSD is crucial for effective treatment.
  • Previous research has identified structural brain abnormalities in PTSD, but early-stage changes require further investigation.

Purpose of the Study:

  • To investigate cerebral alterations in patients with posttraumatic stress disorder (PTSD) using 3D T1-weighted imaging.
  • To examine the relationship between gray and white matter abnormalities and clinical severity/duration of PTSD.
  • To explore anatomic changes in the brain associated with PTSD after a major traumatic event.

Main Methods:

  • 67 patients with PTSD and 78 healthy survivors underwent 3-T magnetic resonance (MR) imaging 7-15 months after a devastating earthquake.
  • Cortical thickness and volumes of 14 subcortical gray matter structures and five subregions of the corpus callosum were analyzed.
  • Statistical differences and correlations between morphometric measures and clinical profiles were evaluated.

Main Results:

  • Patients with PTSD exhibited greater cortical thickness in the right superior temporal gyrus, inferior parietal lobule, and left precuneus compared to controls.
  • Reduced volume was observed in the posterior corpus callosum of patients with PTSD.
  • PTSD severity positively correlated with left precuneus cortical thickness and negatively with posterior corpus callosum volume.

Conclusions:

  • Individuals with PTSD show distinct gray and white matter alterations compared to trauma-exposed controls.
  • Early PTSD is characterized by increased cortical thickness, potentially due to neuroinflammation or compensatory mechanisms.
  • Brain morphometry in PTSD is associated with clinical severity and duration, highlighting potential biomarkers.