Some mental disorders, such as Alzheimer disease, are clearly caused by organic disease of the brain, but the causes of most others are either unknown or not yet verified.

某些心理疾症明显是导因于大脑组织的病变，例如阿兹·海默症，但是绝大部分这类疾病的致病机转，医界仍然不知道知或未能证明。

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Chronic exposure to carbon monoxide and volatile organic compounds has been linked to an increased risk of heart disease, stroke, liver and brain damage, and even cancer.

长期接触一氧化碳和挥发性有机化合物可能会增加心脏病、中风、肝脑损伤和癌症的风险。

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Infantile spasms caused by risk factors for a variety of a particular syndrome, rapid brain development occurs in the special period, often with severe organic brain disease.

婴儿痉挛症为多种发病因素引起的一种特殊综合征，发生在大脑快速发育的特殊时期，往往伴有严重的脑器质性病变。

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