saltatory conduction

Saltatory conduction is a process that allows nerve impulses to travel rapidly along an axon. This occurs in neurons that are insulated by a myelin sheath, a fatty layer composed of lipids and proteins. The myelin sheath is interrupted at intervals by gaps called nodes of Ranvier.12

At these nodes, the neuron membrane is exposed, allowing for the exchange of ions like sodium and chloride. This exchange generates an action potential, which is a reversal of electrical polarization that initiates a nerve impulse. Instead of continuously propagating along the entire axon, the action potential "jumps" from one node of Ranvier to the next. This jumping mechanism, known as saltatory conduction, significantly speeds up the transmission of nerve signals. The speed of conduction is also influenced by the axon's diameter and temperature.13