Health encyclopaedia - Alphabetical Topic List健康百科全书-按字母顺序排列的主题清单
| | A | | 1 | | | B | | b | | | C | | 人才招聘 | | | D | | | | | E | | 电子 | | | F | | f | | | G | | 克 | | | H | | h | | | I | | 我 | | | J | | j | | | K | | k | | | L | | 升 | | | M | | 米 | |
| | N | | n | | | O | | o | | | P | | p | | | Q | |常见问题 | | | R | | 研究 | | | S | | | | | T | | 吨 | | | U | | u | | | V | | v | | | W | | 瓦特 | | | X | | x | | | Y | | y | |
Causes of Alzheimer's disease原因阿尔茨海默氏病
No single factor has been identified as a cause for Alzheimer's disease.没有一个单一的因素已被确定为引起阿尔茨海默病的。 It is likely to be a combination of factors:它很可能是多种因素：
- Age is the greatest risk factor for dementia, with most cases affecting people over 65.年龄是最大的危险因素，老年痴呆症，与大多数情况下，影响人超过65岁。
- It appears that there is a clear genetic link in a few families, where the disease appears relatively early in life, although developing the disease in such families is by no means inevitable.看来，是有明确的遗传环节，少数的家庭，那里的疾病，似乎比较早在生活中，虽然发展中国家的疾病在这样的家庭绝不是无可避免的。 In the vast majority of cases however the effect of genetic inheritance appears to be very small.在绝大多数情况下，但效果遗传似乎很小。
- It is a feature of Down’s syndrome, and 15% of people with Alzheimer’s disease have a family history of Down’s syndrome.这是一个特点downâ € ™综合征，和15 ％的人与alzheimerâ € ™病有家族病史downâ € ™综合征。 Recent research has concentrated on the gene for a substance called beta-amyloid protein that is found in the tangled fibre masses in brains of people with Alzheimer’s disease and in those of older people with Down’s syndrome.最近的研究集中在基因的物质，所谓的β -淀粉样蛋白是发现，在纠缠不清纤维群众在开动脑筋的人与alzheimerâ € ™病，并在这些老年人的人与downâ € ™综合征。 The gene for this protein is on chromosome 21.基因的这种蛋白质是21号染色体上。 This is the same chromosome of which an extra copy is present in every body cell of people with Down’s syndrome.这是相同的染色体，其中一个额外的副本是目前在每一个体细胞的人与downâ € ™综合征。
- Environmental factors are being studied but nothing has been clearly identified.环境因素，现正研究，但一直没有明确确定。 The concerns concerning aluminium causing Alzheimer’s disease have largely been discounted.所关注的关于铝造成alzheimerâ € ™病已经基本上折扣。
- It has also been suggested, but without any convincing clinical evidence, that mercury in dental amalgam might be responsible for causing Alzheimer’s disease.但也有人建议，但没有任何令人信服的临床证据显示，汞在银汞合金可能负责造成alzheimerâ € ™病。
- People with severe head or whiplash injuries appear to be at increased risk of developing dementia.人与严重的头部或颈部受伤，似乎是在风险增加发展中国家的痴呆症。
- Research has also shown that people who smoke and those who have high blood pressure or high cholesterol levels increase their risk of developing Alzheimer's.研究还表明，人谁烟雾和那些谁有血压高的压力或高胆固醇水平，增加他们的风险，发展中国家的阿尔茨海默氏症。
