9月21日是世界阿尔茨海默病日，今年的主题是“立防立治 无问早晚”。阿尔茨海默病（Alzheimer’ Disease, AD)，是一种中枢神经系统退行性疾病，属于老年期痴呆最常见的一种类型。主要表现为渐进性记忆障碍、认知功能减退、人格改变及神经精神症状，严重影响社交、职业与生活功能。
People think that memory is supposed to be perfect.
They think it's designed to remember everything they want to remember.
And this just isn't how it works.
Our brains are not designed to remember people's names, to do something later, or to catalog everything we encounter.
But what I found over and over is that everybody over the age of 50, 60, 70, they think that all kinds of forgetting mean they have Alzheimer's.
They'd say things to me like,"Well, I'm always forgetting names.
And if I don't write down what I have to do later, I won't remember to do it.
And I'm always walking into the kitchen and I don't know why I'm in there."
So these people are panicked and afraid and stressed out and really ashamed of these moments of forgetting, which are actually totally normal.
My name is Lisa Genova.
