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How do you feel? No, I don't mean are you happy or sad? Touch the back of your hand. Did you feel it? How? When you touched your hand, you pressed on nerves in your skin. These nerves reacted and sent a message to your brain, telling you that something touched your hand. Some parts of your skin have more nerves than others. We are going to examine how these nerves are arranged, and see how that can affect the message that your brain gets.
This experiment comes from a question that I got from a subscriber. As I researched the question, it was even more interesting than I expected. It also seemed like a good excuse to eat lots of ice cream.
This experiment is something that we used do for fun when I was a kid. (No jokes about dinosaurs or the Dark Ages, please.) It was back in the days before video games and the internet. Back in the days when there were only 4 TV channels and you had to get up and turn the dial on the TV to change the channel. Even so, we still had lots of fun. This is a science trick that always amazes people.
Any time you hear a sound, it is because something is vibrating. Place your fingers against your throat and hum. You will feel your throat vibrate. We usually hear sounds from vibrations that travel through the air, but solids can be much better at carrying vibrations.
The following test is a way to evaluate your executive functioning. What is the world is that? Well, it means how good you are at telling your brain what to do, even if it wants to do something else.
