Saltatory conduction, leapt out at me too. (That's a Tom Swifty, it is!) And yes, wofa, you are right. It is the SULT family; includes Sil, Sal, Sault, and they all mean jump or leap. Desultory, Salient, Somersault, Resilient, Asault.. the roots are not all the same, but I think a recurring one is the Latin, salire. Shall check and return.