【耶鲁公开课：心理学导论】Lesson 2 这是你的大脑(18)

英语自学网

语气词如Um...这类不用写，有口误重复滴地方就不用写拉╮(╯▽╰)╭
        Hints:
        Surrounded - Surrounding - To
        Descartes
        Koleen
And then if you get a certain number, plus 60 or something, the neuron will fire and it fires along the axon, the thing to the right. The axon is much longer than the dendrites and, in fact, some axons are many feet long. There's an axon leading from your spinal cord to your big toe for instance. It is so shocking the lights go out.
Surrounded - Surrounding - To complete a mechanical metaphor that would have led Descartes to despair. Thank you, Koleen. Surrounding the axon is a myelin sheath, which is actually just insulation. It helps the firing work quicker. So, here are some facts about neurons. There are a lot of them about 1,000 billion of them and each neuron can be connected to around thousands, perhaps tens of thousands, other neurons.