(Stillness in the Storm Editor) The following science article reveals research that shows exposure to violence has neurological effects that would make one avoid social situations in the future. The study was conducted on mice, suggesting that the self-imposed social ostracization coping mechanism may not be human, but mammalian.
This information is important to understand as violence exposure is a feature of modern life, as it passes through mass media. What effects violence have on developing individuals remains a key point of interest in my work to understand how to restore consciousness and heal the human family.
– Justin
(Science Daily) Exposure to violence, social conflict, and other stressors increase risk for psychiatric conditions such as depression and post-traumatic stress disorder.
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by Staff Writer, August 13th, 2019
Not everyone who experiences significant stress will develop such a response, however, and the cellular and molecular basis for an individual’s underlying resilience or susceptibility to stressful events has remained poorly understood. Now, a newly published paper in the journal eLife from researchers at the Advanced Science Research Center (ASRC) at The Graduate Center, CUNY suggests that the behavior of oligodendrocytes — the glial cells that produce the myelin sheath that protects nerve fibers — plays a critical role in determining whether we succumb to or tolerate stress.
Summary: Exposure to violence, social conflict, and other stressors increase risk for psychiatric conditions such as depression and post-traumatic stress disorder. A new paper suggests that the behavior of oligodendrocytes — the glial cells that produce the myelin sheath that protects nerve fibers — plays a critical role in determining whether we succumb to or tolerate stress.
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“Through our study, we were able to identify brain-region-specific differences in the number of mature oligodendrocytes and in the content of myelin between two groups of mice who were categorized based on their resilience or susceptibility to an identical social-defeat stressor,” said the paper’s corresponding author Jia Liu, a research associate professor with the ASRC’s Neuroscience Initiative. “After repeated exposure to an aggressive mouse, some animals, called “susceptible,” avoided any sort of social interaction with their peers, while others remained resilient and continued to be socially engaged.”
In follow-up brain tissue analysis, the research team detected fewer mature oligodendrocytes and irregular myelin coverage in the medial prefrontal cortex — a brain region that plays a critical role in emotional and cognitive processing — in the susceptible mice. In contrast, healthy numbers of oligodendrocytes and myelin were detected in resilient mice.
Methodology
For the study, researchers exposed test mice to an aggressor for five minutes daily over 10 days. Following this period, the mice were placed in the presense of unfamiliar mouse and categorized either as susceptible if they showed signs of social withdrawal or resilient if they still showed interest in socializing with the new mouse — a social behavior that is typically detected in normal mice.
Reseachers next sought to determine if there were myelination differences between susceptible and resilient mice. They looked at two areas of the brain that are known to play a critical role in determining the individual’s response to stress. In one of those areas — the medial prefrontal cortex — they found that the myelinated segments of nerve fiber in susceptible mice were shorter in length and thinner than typical. They did not find this condition in the resilient or control mice groups. They also investigated the state of each mouse group’s glial cells, and discovered that in susceptible mice fewer of these cells had differentiated into myelin-producing oligodendrocytes.
In a final experiment, researchers found that induced damage to the myelin in the medial prefrontal cortex caused altered social behavior in mice, but the behavior returned to normal when new myelin was formed.
“Dr. Liu’s research has highlighted the importance of stressful social events in changing the epigenetic code of oligodendrocyte progenitors, which may account for the increased susceptibility to developing chronic psychiatric disorders in some individuals,” said Patrizia Casaccia, founding director of the ASRC Neuroscience Initiative. “Her data suggest that oligodendrocyte progenitor differentiation can be affected by emotional and psychological events, and this provides a new concept for preventing and treating depression. Current treatments target neuronal function, but Dr. Liu’s work identifies potential new therapy targets as it suggests glial cell dysfunction could be a cause of stress-related mental disorders.”
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Story Source:
Materials provided by Advanced Science Research Center, GC/CUNY. Note: Content may be edited for style and length.
Journal Reference:
- Valentina Bonnefil, Karen Dietz, Mario Amatruda, Maureen Wentling, Antonio V Aubry, Jeffrey L Dupree, Gary Temple, Hye-Jin Park, Nesha S Burghardt, Patrizia Casaccia, Jia Liu. Region-specific myelin differences define behavioral consequences of chronic social defeat stress in mice. eLife, 2019; 8 DOI: 10.7554/eLife.40855
Stillness in the Storm Editor: Why did we post this?
Psychology is the study of the nature of mind. Philosophy is the use of that mind in life. Both are critically important to gain an understanding of as they are aspects of the self. All you do and experience will pass through these gateways of being. The preceding information provides an overview of this self-knowledge, offering points to consider that people often don’t take the time to contemplate. With the choice to gain self-awareness, one can begin to see how their being works. With the wisdom of self-awareness, one has the tools to master their being and life in general, bringing order to chaos through navigating the challenges with the capacity for right action.
– Justin
Not sure how to make sense of this? Want to learn how to discern like a pro? Read this essential guide to discernment, analysis of claims, and understanding the truth in a world of deception: 4 Key Steps of Discernment – Advanced Truth-Seeking Tools.
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Source:
https://www.sciencedaily.com/releases/2019/08/190813080212.htm
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