如何测有没有阿尔茨海默（了解大脑NO阿尔兹海默）

如何测有没有阿尔茨海默（了解大脑NO阿尔兹海默）A bee lands on your bare foot. Eek! Sensory neurons in your skin relay this information to your spinal cord and brain at a speed of more than 240kmph. Your brain then uses motor neurons to transmit the message back through your spinal cord to your foot – to shake the bee off quickly! Motor neurons can relay this message at more than 320kmph. Wow!Neurons send information to your brain at more than

Discover the fascinating world of the human brain!

Inside your body's control centre…

There's a mass of wrinkly material in your head weighing around 1.3kg which controls every single thing you will ever do. It enables you to think learn create and feel emotions as well as controlling every blink breath and heartbeat. This fantastic organ is your brain! It's so amazing that famous scientist James D. Watson once called the brain "the most complex thing we have yet discovered in our universe." Here's why!

Your brain is faster and more powerful than a supercomputer!

Your kitten is in the kitchen. She's about to step on the hot cooker. You have only seconds to act. Accessing the signals coming from your eyes your brain quickly calculates when where and at what speed you will need to leap to stop her. Then it orders your muscles to spring into action. Your timing is perfect and she's safe! No computer can come close to your brain's amazing ability to download process and react to the flood of information coming from your eyes ears and other sensory organs. Cool!

Your brain generates enough electricity to power a lightbulb

Your brain contains about 100 billion microscopic cells called neurons. There are so many it would take you over 3 000 years to count them all! Whenever you dream laugh think see or move it's because minute chemical and electrical signals are racing between these neurons along billions of tiny neuron pathways. Incredibly the activity in your brain never stops. Countless messages zip around inside it every second – just like a supercharged pinball machine. Your neurons create and send more messages than all the phones in the entire world. And while a single neuron generates only a very small amount of electricity all your neurons together can produce enough energy to power a low-wattage light bulb. Imagine that!

Neurons send information to your brain at more than 240kmph!

A bee lands on your bare foot. Eek! Sensory neurons in your skin relay this information to your spinal cord and brain at a speed of more than 240kmph. Your brain then uses motor neurons to transmit the message back through your spinal cord to your foot – to shake the bee off quickly! Motor neurons can relay this message at more than 320kmph. Wow!

When you learn you change the stucture of your brain

Riding a bike seems impossible at first but soon you master it. How? As you practise your brain sends 'bike riding' messages along pathways of neurons again and again forming new connections. In fact the structure of your brain changes every time you learn as well as whenever you have a new thought or memory. Now that's clever!

Exercise helps make you smarter

It's well known that any exercise that makes your heart beat faster – like running or playing a sport – is great for your body and can even help improve your mood. But scientists have recently learned that for a period of time after you've exercised your body produces a chemical that makes your brain more willing to learn. So if you're stuck on some tricky homework go out and run around for a while then tackle the problem again. You might discover that you're much more able to solve it!

探索人类大脑的迷人世界！

在你身体的控制中心…

你的脑袋里有一团起皱的物质，重约1.3公斤，它控制着你将要做的每一件事。它能让你思考，学习，创造和感受情绪，以及控制每一个眨眼，呼吸和心跳。这个神奇的器官就是你的大脑！令人惊奇的是，著名科学家詹姆斯沃森曾称大脑是"我们在宇宙中发现的最复杂的东西"。原因如下！

你的大脑比超级计算机更快更强大！

你的小猫在厨房里。她要踩热锅了。你只有几秒钟的行动时间。从你的眼睛里得到的信号，你的大脑会迅速计算出你需要在什么时候，在什么地方，以什么速度跳跃来阻止她。然后它命令你的肌肉开始活动。你的时机很好，她很安全！没有一台计算机能够接近你大脑的惊人能力，即下载、处理和应对来自你的眼睛、耳朵和其他感官的大量信息。太酷了！

你的大脑产生足够的电能来给灯泡供电

你的大脑含有大约1000亿个叫做神经元的微观细胞。有这么多，你要花三千多年才能把它们全部数清！每当你做梦、大笑、思考、看东西或移动时，都是因为这些神经元之间的微小化学和电信号正沿着数十亿个微小的神经元通路在奔跑。难以置信的是，你大脑的活动从未停止过。无数的信息每秒钟都会在里面传递——就像一个超级弹球机。你的神经元比世界上所有的手机都能产生和发送更多的信息。当一个神经元只产生很少量的电时，所有的神经元一起就能产生足够的能量来驱动一个低功率的灯泡。想象一下！

神经元以每小时240公里的速度向你的大脑发送信息！

一只蜜蜂赤脚着地。好吧！皮肤中的感觉神经元以超过每小时240公里的速度将这些信息传递给脊髓和大脑。然后，你的大脑利用运动神经元将信息通过脊髓传回你的脚——快速甩掉蜜蜂！运动神经元可以在超过每小时320公里的速度下传递这个信息。

当你学会了，你就改变了你的大脑结构

一开始骑自行车似乎是不可能的，但很快你就掌握了。怎样？当你练习时，你的大脑一次又一次地沿着神经元的路径发送"骑自行车"的信息，形成新的联系。事实上，你的大脑结构在你每次学习的时候，以及你有新的想法或记忆的时候都会发生变化。现在真聪明！

锻炼有助于使你更聪明

众所周知，任何能让你心跳加快的运动——比如跑步或运动——对你的身体都有好处，甚至可以帮助改善你的情绪。但是科学家最近发现，在你运动后的一段时间内，你的身体会产生一种化学物质，使你的大脑更愿意学习。所以，如果你困在一些棘手的家庭作业上，出去走走，然后再解决问题。你可能会发现你更能解决它！