Tags: Anatomical Structure.
Myelin sheath gaps or more commonly known as nodes of Ranvier are the gaps (approximately 1 micrometer in length) formed between the myelin sheaths generated by different cells. A myelin sheath is a many-layered coating largely composed of a fatty substance called myelin that wraps around the axon of a neuron and very efficiently insulates it. At nodes of Ranvier the axonal membrane is uninsulated and therefore capable of generating electrical activity.
