What type of signal jumps from node to node between the Schwann cells to move down the axon?

The type of signal that jumps from node to node between Schwann cells is called an action potential. This process occurs through a mechanism known as saltatory conduction, where the action potential propagates rapidly along the axon by jumping from one node of Ranvier to the next. This allows for faster transmission of electrical signals compared to unmyelinated axons.