关于自闭症成因 》》》选自美国自闭症网

北京自闭症论坛

没有任何已知的自闭症的单一原因，但人们普遍接受，它是由大脑结构或功能异常引起的。 Brain scans show differences in the shape and structure of the brain in children with autism versus neuro-typical children.脑扫描显示儿童自闭症与神经典型的儿童大脑的形状和结构的差异。 Researchers are investigating a number of theories, including the link between heredity, genetics and medical problems.研究人员调查了多种理论，包括遗传，遗传学和医学问题之间的联系。 In many families, there appears to be a pattern of autism or related disabilities, further supporting a genetic basis to the disorder.在许多家庭中，似乎有自闭症或有关残疾人的格局，进一步支持了遗传基础的障碍。 While no one gene has been identified as causing autism, researchers are searching for irregular segments of genetic code that children with autism may have inherited.虽然没有人基因已被确定为导致自闭症，研究人员正在寻找遗传密码的不规则部分自闭症儿童可能继承。 It also appears that some children are born with a susceptibility to autism, but researchers have not yet identified a single "trigger" that causes autism to develop.这似乎也与孤独症易感，有些孩子是天生的，但研究人员尚未确定一个单一的“触发”，导致自闭症发展。

Other researchers are
investigating the possibility that under certain conditions, a cluster of unstable genes may interfere with brain development, resulting in autism.其他研究人员正在研究，在一定条件下，不稳定的基因群，可能会干扰大脑发育，造成自闭症的可能性。 Still other researchers are investigating problems during pregnancy or delivery as well as environmental factors, such as viral infections, metabolic imbalances, and exposure to environmental chemicals.还有其他一些研究人员正在研究在怀孕期间或分娩的问题，以及环境因素，如病毒感染，代谢失衡，并暴露于环境化学，。

Genetic Vulnerability遗传脆弱性 Autism tends to occur more frequently than expected among individuals who have certain medical conditions, including Fragile X syndrome, tuberous sclerosis, congenital rubella syndrome, and untreated phenylketonuria (PKU).自闭症往往比预期有一定的医疗条件，包括脆性X综合征，结节性硬化症，先天性风疹综合征，和未经处理的苯丙酮尿​​症（PKU）的个人之间谁更频繁地发生。 Some harmful substances ingested during pregnancy also have been associated with an increased risk of autism.在怀孕期间摄入一些有害物质也已与自闭症风险增加。 Read more about related conditions .了解更多的相关条件 。

Environmental Factors环境因素 Research indicates that other factors besides the genetic component are contributing to the rise in increasing occurrences of ASD, such as environmental toxins (eg, heavy metals such as mercury), which are more prevalent in our current environment than in the past.研究表明，除了遗传组成部分的其他因素导致ASD的环境毒素（如重金属，如汞），这是比以往更盛行在我国目前的环境，如增加出现上升。 Those with ASD (or those who are at risk) may be especially vulnerable, as their ability to metabolize and detoxify these exposures can be compromised. ASD（或那些处于危险之中）可能特别脆弱，因为他们代谢能力和解毒可能会受到这些风险。 Read more about environmental health and autism .阅读更多的环境，健康

特教追逐者

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特教追逐者 发表于 2011-10-21 11:58
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英文网站上的资料。自己翻译的。