It’s not just the trauma itself that leaves deep scars on the mind. What really makes the difference is above all the moment of life in which that experience is lived. This is the conclusion reached by an important study coordinated by the Italian Institute of Technology together with the IRCCS Istituto Giannina Gaslini, published in the scientific journal Cell Reports Medicine. The research opens up a scenario destined to have enormous consequences in the way in which psychological disorders linked to traumatic experiences are interpreted and treated. According to scientists, in fact, two people exposed to similar events can develop completely different problems because the brain reacts differently depending on the developmental stage in which the trauma occurs.
Childhood, adolescence, adulthood: each phase leaves different signs
The study was coordinated by Laura Cancedda and Valter Tucci, with the contribution of specialists from Gaslini and the University of Genoa. Through mouse models and the analysis of human clinical samples, the research group observed how traumas produce different consequences on the brain and behavior depending on the age at which they are experienced. Trauma in early childhood, for example, can compromise sociality and relational skills. However, if it occurs during adolescence, the risk of developing aggressive, dominant or impulsive behavior increases. Anxiety, however, emerges as a transversal element present in practically all the phases analyzed. Researchers speak of real “critical windows of development”, moments in which the brain is particularly vulnerable to traumatic events because it is undergoing profound biological and neurological transformations.
The invisible wounds that change the brain
One of the most impressive aspects that emerged from the research concerns the way in which trauma is physically “imprinted” on the brain. Through omics and proteomic analyses, scholars have discovered that traumatic experiences activate biological processes capable of persistently modifying brain functioning. Among the phenomena observed are oxidative stress, cellular alterations, programmed death of some nerve cells and changes in neuronal communication systems. Not all brain areas are affected in the same way: early trauma mainly affects the amygdala, hippocampus and hypothalamus, regions linked to emotional memory, fear and stress regulation. Later trauma tends to involve the prefrontal cortex, which is fundamental for the control of emotions, decisions and social behavior. This means that the brain retains a sort of “biological memory” of traumatic experiences, and that memory can influence behavior even many years later.
Toward more personalized care for anxiety and post-traumatic disorders
Italian research also identifies a possible therapeutic target: the BDNF – Brain-Derived Neurotrophic Factor pathway, a key protein for brain plasticity and the brain’s ability to adapt and regenerate. According to scholars, intervening on this mechanism could help attenuate the effects of some traumas, especially when they occur in young adulthood. The most innovative perspective, however, is another: developing personalized trauma medicine, built not only on the type of experience lived, but also on the age at which that wound opened. It is an important change of perspective because it suggests that depression, aggression, attention deficits or post-traumatic stress disorders are not just generic consequences of the pain experienced, but the result of a much more precise interaction between trauma and brain development. A fundamental discovery that could change the way child psychiatry and neuropsychiatry deal with psychological distress in the coming years and help so many people to no longer be alone.
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