📖 what
What is the myelin sheath?
Human BodyNervous System
Quick Answer
The myelin sheath is a fatty insulating layer around nerve fibers that helps electrical signals travel faster. It is produced by different supporting cells in the brain and body.
The Full Story
Myelin wraps around axons like insulation around a wire. In the central nervous system, it is made by oligodendrocytes; in the peripheral nervous system, by Schwann cells. Myelin speeds signal transmission and helps conserve energy by allowing impulses to jump between nodes of Ranvier. Disorders such as multiple sclerosis damage myelin and disrupt communication between nerve cells. Without myelin, many rapid nervous-system functions would be far less efficient.
Key Facts
1.Insulates nerve fibers
2.Made by oligodendrocytes and Schwann cells
3.Damage can cause multiple sclerosis
YouTube Angle
Suggested video title for this topic:
"The insulation that lets your nerves fire fast"