title: Effect of stimulator orientation on F-wave persistence.
abstract: Most electrodiagnosis texts advocate cathode distal stimulation (CDS) for nerve conduction, but suggest cathode proximal stimulation (CPS) for F waves, because of anodal block. We postulated that CDS and CPS elicit F waves of similar persistence. We studied 657 (207 median, 204 ulnar, 136 tibial, and 110 peroneal) nerves in 225 consecutive subjects. In the median nerve, CDS elicited F waves of slightly greater persistence than CPS. Stimulator orientation did not affect F-wave persistence in the remaining nerves.
authors.affiliation: Department of Neurology, University of Florida College of Medicine, Gainesville 32610-0236, USA.
authors.forename: M S
authors.initials: MS
authors.lastname: Young
authors.forename: W J
authors.initials: WJ
authors.lastname: Triggs
mesh_terms: D004558:Electric Stimulation / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D004594:Electrophysiology; D005260:Female; D006801:Humans; D008297:Male; D009046:Motor Neurons / Q000502:physiology*; D010525:Peripheral Nerves / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology; D013116:Spinal Cord / Q000166:cytology / Q000502:physiology*