In a typical motor neuron information travels as an action potential, a depolarization of the cell membrane. Action potentials travel toward the cell body along short projections called dendrites and away from the cell body along a much longer axon. This axon is myelinated. The bulges are sections wrapped in insulating layers made by supporting cells and there are gaps or nodes between them. Action potentials jump from node to node so that a signal travels more quickly than it would along an unmyelinated axon.