 So, in your studies, you've learned that myelin will greatly increase the speed of action potential propagation, but do you know why? The reason behind it is that when you insulate a portion of the axon, the action potential gets to jump from node to node down an axon, meaning that it gets to open up sodium channels only at the nodes and it gets to skip over the entire insulated part. So, it's almost like the action potential is taking giant steps down the axon. And when it takes those giant steps, it's going to be able to get to the target much faster than if it had to go through the entire axon and open up individual sodium channels as it goes. These baby steps are called continuous conduction and it's going to take much longer for an action potential to get there than if it was able to have saltatory conduction and move from node to node. And just to illustrate time frame, I'll grab an assistant. She's going to be continuous conduction. I'm going to be saltatory conduction and we'll see who gets there first. Ready? Go. Saltatory conduction. Myelin without it would move much, much slower.