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Neurobiological adaptations to violence across development
Hilary K Mead1, Theodore P Beauchaine, Katherine E Shannon
1University of Washington, Seattle, WA 98195-1525, USA.
Development and Psychopathology
|January 28, 2010
Summary
Exposure to violence can alter gene expression and brain development, increasing the risk for lifelong psychopathology. These developmental adaptations, while aiding survival in violent settings, become maladaptive elsewhere.
Area of Science:
- Developmental psychology
- Neuroscience
- Genetics
Background:
- Violent environments trigger complex developmental adaptations across multiple biological and behavioral levels.
- Understanding these adaptations is crucial for addressing psychopathology.
- Previous research has explored various facets of violence exposure's impact.
Purpose of the Study:
- To review the potentiating effects of violence on genetic vulnerabilities and neurotransmitter systems.
- To describe implications of violence exposure for brain development, focusing on the hippocampus and prefrontal cortex.
- To examine the effects of violence on developing human stress and startle responses.
Main Methods:
- This review integrates existing literature on the developmental effects of violence.
- Studies from rodents, nonhuman primates, and humans are synthesized.
- A multi-level analysis from genes to behavior is employed.
Main Results:
- Violence exposure can exacerbate genetic vulnerabilities, influencing neurotransmitter systems and leading to internalizing and externalizing psychopathology.
- Violence impacts brain development, particularly affecting the hippocampus and prefrontal cortex.
- Developing stress and startle responses are significantly altered by violence exposure.
Conclusions:
- Neurobiological changes adaptive for survival in violent contexts can confer lifelong risk for psychopathology in different environments.
- Early life exposure to violence has profound and lasting effects on development.
- Interdisciplinary approaches are essential for understanding and mitigating the consequences of violence exposure.
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