The Nodes of Ranvier are the regions on a myelinated axon between the myelin sheaths. These regions contain the voltage-gated ion channels and sodium-potassium pumps needed to conduct an action potential. To see the role of the nodes of Ranvier in conducting an action potential, see: saltatory conduction.
![myelination](http://eprojects.isucomm.iastate.edu/314-4-kbcm/wp-content/uploads/sites/5864/2016/11/Myelination-300x126.jpg)