You could do brain surgery while fully conscious because the brain itself has no sense organs to it.

你完全可以在意识清醒的状态下,接受脑部手术,因为大脑本身并没有任何的感觉器官

耶鲁公开课 - 心理学导论课程节选

So, there's a whole lot of sensory organs, for instance, focused along your tongue, and that's why that's so big, and an enormous amount on your face but your shoulder isn't even— doesn't even make it on there because although your shoulder might be bigger than your tongue, there's not much going on.

比如,在你的舌头上,集中存在着非常多的感觉器官,也就是这片区域如此之大的原因,你的脸上也有数量庞大的感觉器官,但你的肩膀并没有,你的肩膀甚至都没有在示意图中标示出来,因为,尽管你的肩膀要比你的舌头更大,但却并没有什么感受器官

耶鲁公开课 - 心理学导论课程节选