local response Subthreshold potentials decrease in strength as they spread from their point of origin, i.e conducted with decrement This passive spread of electrical signals with no changes in membrane property is known as electrotonic conduction• This passive spread of electrical signals with no changes in membrane property is known as electrotonic conduction. • Subthreshold potentials decrease in strength as they spread from their point of origin, i.e. conducted with decrement. ➢ local response