This 2015 New York combined animal and human review of epigenetic studies noted:
“While genetic factors are important in the etiology of most mental disorders, the relatively high rates of discordance among identical twins, particularly for depression and other stress-related syndromes, clearly indicate the importance of additional mechanisms.
Environmental factors such as stress are known to play a role in the onset of these illnesses.
Exposure to such environmental insults induces stable changes in gene expression, neural circuit function, and ultimately behavior, and these maladaptations appear distinct between developmental versus adult exposures.
Increasing evidence indicates that these sustained abnormalities are maintained by epigenetic modifications in specific brain regions.”
Placing the “maladaptations” and “sustained abnormalities” phrases into their contexts:
- A fetus biologically adapted to their environment – however toxic it was – in order to best survive.
- These adaptations for survival were subsequently viewed as Disrupted Neurodevelopment and “maladaptations” from the perspectives of normal development and environments.
- The “sustained abnormalities” caused within the earlier environments persisted. An improved environment in and of itself wasn’t impetus enough to change earlier adaptations, the so-called “maladaptations.”
Per the below link, it’s been a month since this review was published. Why has there been ZERO news coverage of it?
One reason may be that the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, didn’t issue a press release or otherwise publicize it. Another reason may be the groups that are opposed to its findings:
- Parents who provided toxic environments for their children, beginning at conception;
- People who feel threatened when scientific causal evidence resonates with what happened in their own lives, and in response, limit their empathetic understanding of others’ problems;
- Social workers, psychologists, and others in industries whose paychecks depend on efforts that aren’t directed towards ameliorating the causes for these later-life effects;
- Psychiatrists and medical personnel whose livelihoods depend on pharmaceutical and other treatments that only alleviate symptoms;
- Researchers whose funding depends on producing non-etiologic findings.
Despite such resistance to this review’s findings, a large number of people would benefit from publicizing evidence for:
“These sustained abnormalities are maintained by epigenetic modifications in specific brain regions.”
http://nro.sagepub.com/content/early/2015/09/24/1073858415608147 “Epigenetic Basis of Mental Illness”