In this video, I discuss myelin, an insulatory layer that covers the axons of many neurons in the nervous system. I describe myelin's role in promoting efficient neuronal signaling, and I discuss its structure, which consists of stretches of myelin called internodes surrounding intermittent gaps in myelin called nodes of Ranvier. I also discuss the cells that form myelin: Schwann cells in the peripheral nervous system and oligodendrocytes in the central nervous system.
Welcome to Neuroscientifically Challenged! All of the content for the site is collected on this home page, but if you're looking for specific types of content you can use the menu bar above. By clicking on Articles, you'll find links to blog articles on a variety of different neuroscience topics. The Know Your Brain link will take you to a listing of reference articles, each of which deals with a different part of the nervous system. Clicking on the 2-Minute Neuroscience Videos link will take you to an assortment of 2-minute videos that each teach you about a different aspect of neuroscience. And the Glossary contains a large selection of definitions for common neuroscience terms.