What part of the neuron that speeds message to the axon?

The part of the neuron that speeds up the transmission of electrical signals to the axon is the myelin sheath. This fatty layer encases the axon and acts as an insulator, allowing electrical impulses to travel more rapidly through a process called saltatory conduction. By jumping between the nodes of Ranvier—gaps in the myelin sheath—the signal is transmitted more efficiently compared to unmyelinated axons.