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Approximately 30% of the variance in PTSD is caused by genetics alone. [1] For twins exposed to combat in the Vietnam War, a monozygotic (identical) twin with PTSD was associated with an increased risk of the co-twin having PTSD, as compared to dizygotic (non-identical) twins; [2] additionally, assaultive trauma (compared to non-assaultive trauma) was more likely to exacerbate these effects.
Genetics. A review of twin studies suggested that PTSD is, in part, a heritable mental illness. As much as 40 percent of someone’s chance of developing it is genetic.
Post-traumatic stress disorder (PTSD) is an stress-related mental health disorder that emerges in response to traumatic or highly stressful experiences. It is believed that PTSD develops as a result of an interaction between these traumatic experiences and genetic factors.
Risk factors for mental illness include psychological trauma, adverse childhood experiences, genetic predisposition, and personality traits. [7] [8] Correlations between mental disorders and substance use are also found to have a two way relationship, in that substance use can lead to the development of mental disorders and having mental disorders can lead to substance use/abuse.
Post-traumatic stress disorder (PTSD) [b] is a mental and behavioral disorder [8] that develops from experiencing a traumatic event, such as sexual assault, domestic violence, child abuse, warfare and its associated traumas, natural disaster, traffic collision, or other threats on a person's life or well-being.
The basic principle behind psychiatric genetics is that genetic polymorphisms (as indicated by linkage to e.g. a single nucleotide polymorphism) are part of the causation of psychiatric disorders. [1] Psychiatric genetics is a somewhat new name for the old question, "Are behavioral and psychological conditions and deviations inherited?".
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