Smaller hippocampal volume predicts pathologic vulnerability to psychological trauma. 2002

Mark W Gilbertson, and Martha E Shenton, and Aleksandra Ciszewski, and Kiyoto Kasai, and Natasha B Lasko, and Scott P Orr, and Roger K Pitman
Research Service, Veterans Administration Medical Center, 718 Smyth Road, Manchester, New Hampshire 03104, USA. mark.gilbertson@med.va.gov

In animals, exposure to severe stress can damage the hippocampus. Recent human studies show smaller hippocampal volume in individuals with the stress-related psychiatric condition posttraumatic stress disorder (PTSD). Does this represent the neurotoxic effect of trauma, or is smaller hippocampal volume a pre-existing condition that renders the brain more vulnerable to the development of pathological stress responses? In monozygotic twins discordant for trauma exposure, we found evidence that smaller hippocampi indeed constitute a risk factor for the development of stress-related psychopathology. Disorder severity in PTSD patients who were exposed to trauma was negatively correlated with the hippocampal volume of both the patients and the patients' trauma-unexposed identical co-twin. Furthermore, severe PTSD twin pairs-both the trauma-exposed and unexposed members-had significantly smaller hippocampi than non-PTSD pairs.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D003130 Combat Disorders Neurotic reactions to unusual, severe, or overwhelming military stress. Neuroses, War,War Neuroses,Combat Neuroses,Combat Neurosis,Combat Stress Disorders,Shell Shock,War Neurosis,Combat Disorder,Combat Stress Disorder,Disorder, Combat,Disorder, Combat Stress,Disorders, Combat,Disorders, Combat Stress,Neuroses, Combat,Neurosis, Combat,Neurosis, War,Shell Shocks,Shock, Shell,Shocks, Shell,Stress Disorder, Combat,Stress Disorders, Combat
D006624 Hippocampus A curved elevation of GRAY MATTER extending the entire length of the floor of the TEMPORAL HORN of the LATERAL VENTRICLE (see also TEMPORAL LOBE). The hippocampus proper, subiculum, and DENTATE GYRUS constitute the hippocampal formation. Sometimes authors include the ENTORHINAL CORTEX in the hippocampal formation. Ammon Horn,Cornu Ammonis,Hippocampal Formation,Subiculum,Ammon's Horn,Hippocampus Proper,Ammons Horn,Formation, Hippocampal,Formations, Hippocampal,Hippocampal Formations,Hippocampus Propers,Horn, Ammon,Horn, Ammon's,Proper, Hippocampus,Propers, Hippocampus,Subiculums
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000437 Alcoholism A primary, chronic disease with genetic, psychosocial, and environmental factors influencing its development and manifestations. The disease is often progressive and fatal. It is characterized by impaired control over drinking, preoccupation with the drug alcohol, use of alcohol despite adverse consequences, and distortions in thinking, most notably denial. Each of these symptoms may be continuous or periodic. (Morse & Flavin for the Joint Commission of the National Council on Alcoholism and Drug Dependence and the American Society of Addiction Medicine to Study the Definition and Criteria for the Diagnosis of Alcoholism: in JAMA 1992;268:1012-4) Alcohol Abuse,Alcoholic Intoxication, Chronic,Ethanol Abuse,Alcohol Addiction,Alcohol Dependence,Alcohol Use Disorder,Abuse, Alcohol,Abuse, Ethanol,Addiction, Alcohol,Alcohol Use Disorders,Chronic Alcoholic Intoxication,Dependence, Alcohol,Intoxication, Chronic Alcoholic,Use Disorders, Alcohol
D012307 Risk Factors An aspect of personal behavior or lifestyle, environmental exposure, inborn or inherited characteristic, which, based on epidemiological evidence, is known to be associated with a health-related condition considered important to prevent. Health Correlates,Risk Factor Scores,Risk Scores,Social Risk Factors,Population at Risk,Populations at Risk,Correlates, Health,Factor, Risk,Factor, Social Risk,Factors, Social Risk,Risk Factor,Risk Factor Score,Risk Factor, Social,Risk Factors, Social,Risk Score,Score, Risk,Score, Risk Factor,Social Risk Factor
D013313 Stress Disorders, Post-Traumatic A class of traumatic stress disorders with symptoms that last more than one month. Moral Injury,Neuroses, Post-Traumatic,PTSD,Post Traumatic Stress Disorder,Post-Traumatic Stress Disorders,Acute Post-Traumatic Stress Disorder,Chronic Post-Traumatic Stress Disorder,Delayed Onset Post-Traumatic Stress Disorder,Neuroses, Posttraumatic,Posttraumatic Stress Disorders,Stress Disorder, Post Traumatic,Stress Disorders, Posttraumatic,Acute Post Traumatic Stress Disorder,Chronic Post Traumatic Stress Disorder,Delayed Onset Post Traumatic Stress Disorder,Injury, Moral,Moral Injuries,Neuroses, Post Traumatic,Post Traumatic Stress Disorders,Post-Traumatic Neuroses,Post-Traumatic Stress Disorder,Posttraumatic Neuroses,Posttraumatic Stress Disorder,Stress Disorder, Post-Traumatic,Stress Disorder, Posttraumatic
D014430 Twins, Monozygotic Two off-spring from the same PREGNANCY. They are from a single fertilized OVUM that split into two EMBRYOS. Such twins are usually genetically identical and of the same sex. Twins, Identical,Identical Twin,Identical Twins,Monozygotic Twin,Monozygotic Twins,Twin, Identical,Twin, Monozygotic
D015897 Comorbidity The presence of co-existing or additional diseases with reference to an initial diagnosis or with reference to the index condition that is the subject of study. Comorbidity may affect the ability of affected individuals to function and also their survival; it may be used as a prognostic indicator for length of hospital stay, cost factors, and outcome or survival.

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