Final answer:
Saltatory conduction occurs when an impulse jumps from node to node in myelinated axons, which allows signals to propagate faster.
Step-by-step explanation:
Saltatory conduction occurs when an impulse jumps from node to node. In myelinated axons, the voltage-gated channels are only found at the nodes of Ranvier, so the electrical events seem to 'jump' from one node to the next. This type of conduction is faster than continuous conduction and allows myelinated axons to propagate their signals more quickly.