What in myelinated axons the voltage-regulated sodium channels are concentrated at the nodes of Ranvier?

In myelinated axons, voltage-regulated sodium channels are concentrated at the nodes of Ranvier to facilitate rapid action potential propagation through a process called saltatory conduction. The myelin sheath insulates the axon, preventing ion flow along the myelinated segments, while the nodes allow for the influx of sodium ions when the membrane depolarizes. This arrangement enhances the speed and efficiency of nerve signal transmission, enabling faster communication between neurons.