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Stress and hippocampal abnormalities in psychiatric disorders
1Department of Psychiatry, IRCCS Policlinico S. Matteo, School of Medicine, University of Pavia, Pavia, Italy.
Summary
Repeated stress may cause hippocampal atrophy, a condition linked to posttraumatic stress disorder (PTSD), major depressive disorder (MDD), and borderline personality disorder (BPD). Further research is needed to confirm this link in neuropsychiatric illnesses.
Area of Science:
- Neuroscience
- Psychiatry
- Medical Imaging
Background:
- The hippocampus is crucial for stress regulation but vulnerable to stress-induced neurotoxicity.
- Hippocampal abnormalities are observed in psychiatric disorders like PTSD, MDD, and BPD.
Purpose of the Study:
- To review the hippocampus's role in stress circuitry and cognitive function.
- To examine brain imaging studies on hippocampal involvement in PTSD, MDD, and BPD.
Main Methods:
- Literature review of physiological roles and stress effects on the hippocampus.
- Review of controlled brain imaging studies in animal models and human psychiatric disorders.
Main Results:
- Stress impacts cognitive functions mediated by the hippocampus.
- Studies indicate potential hippocampal atrophy in individuals with PTSD, MDD, and BPD due to associated stressors.
Conclusions:
- The hippocampus may undergo atrophy in PTSD, MDD, and BPD.
- Longitudinal studies are required to establish the relationship between stress and hippocampal atrophy in these conditions.