We disclose methods and medical device systems for selectively recruiting a nerve fiber type within a cranial nerve, a peripheral nerve or a spinal root. Such a method may comprise applying a first pressure, a heating, and/or a cooling to a second location of the nerve, the pressure, heating, or cooling sufficient to substantially block at least one of activation or conduction in at least one fiber population through the second location of the nerve for a blocking time period; and applying an electrical signal to a first location during the blocking time period.