Conductors.
Thomas Edison
The first person to get killed by a lightning strike.
That material would be included in the category of electrical "insulators".
Trans-stimulation is a procedure used to depolarize the neurons in the brain. Electromagnetic is used to weaken the electrical currents that are currently running through the human brain.
Very low strength electrical currents applied through the skin stimulate muscles and make them contract, helping paralyzed or weakened muscles respond again.
The material that electrons do not readily flow through in the electrical trade is classed an an insulator.
Insulator.
ions
Thomas Edison
permeable
The first person to get killed by a lightning strike.
By Flowing of Free or Conduction Electrons
An electrical conductor is a material which lets electricity pass through it.
piezoelectricity
Electric Current.
Insulators
This would likely be an "insulator" as opposed to a conductor.