In what way is a myelinated axon that has lost its myelin (through disease) different from an axon that was never myelinated?

Question

Quizplus · Accepted Answer

A myelinated axon that has lost its myelin will still have sodium gates along its surface, whereas an axon that was never myelinated would not have these gates. However, the loss of the myelin may result in slower conduction velocity and a shorter effective refractory period. The diameter and threshold of the axon may also be affected, but these factors are not consistently different between a demyelinated and never-myelinated axon.

In What Way Is a Myelinated Axon That Has Lost