title: Electrical nerve fatigue: advantages of an alternating bidirectional waveform.
mesh_terms: D000200:Action Potentials; D000818:Animals; D001285:Atropine; D004285:Dogs; D004558:Electric Stimulation; D004567:Electrodes, Implanted; D005283:Fentanyl; D008722:Methods; D009431:Neural Conduction; D010791:Phrenic Nerve / Q000502:physiology*; D012119:Respiration; D013997:Time Factors; D014326:Tropanes
chemical_list: D014326:Tropanes; D001285:Atropine; D005283:Fentanyl