title: Electrodiagnostic evaluation of peripheral nerve function in rheas and barred owls.
abstract: OBJECTIVE
  To establish reference values for electrodiagnostic evaluation of peripheral nerve function in birds.
  
  
  METHODS
  6 rheas and 6 barred owls.
  
  
  METHODS
  Birds were anesthetized with propofol or isoflurane in oxygen. Using a computer-based electromyograph system and needle electrodes for stimulation and recording, electromyography (EMG) was performed on the pectoral, biceps brachialis, and gastrocnemius muscles, and evoked EMG was performed on the tibial and ulnar nerves. Motor nerve conduction velocity (MNCV) was calculated. Repetitive stimulation was performed on these 2 nerves. Late F waves were recorded for each nerve, when possible.
  
  
  RESULTS
  Activity was evident during insertion of the electrodes, but muscles tested were electrically quiescent after spontaneous EMG. Motor nerve conduction velocity was faster in the tibial nerve than ulnar nerve but did not differ significantly between species. Mean +/- SEM MNCV was 132.3+/-7.8 m/s for the tibial nerve and 59.7+/-7.8 m/s for the ulnar nerve. A significant difference was not observed in responses at the fourth or ninth stimulation during repetitive stimulation. Subsequent to the initial stimulation, amplitudes were +/-22.7% of the initial motor potential amplitude. Recorded F waves were inconsistent, which may have been associated with technique.
  
  
  CONCLUSIONS
  Reference range (mean +/-2 SEM) for MNCV was 34.1 to 75.3 m/s for the ulnar nerve and 116.7 to 147.9 m/s for the tibial nerve in barred owls and rheas. After repetitive stimulation, motor potential amplitudes may be +/-22.7% of the initial amplitude response.
authors.affiliation: Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville 32610, USA.
authors.forename: T L
authors.initials: TL
authors.lastname: Clippinger
authors.forename: S R
authors.initials: SR
authors.lastname: Platt
authors.forename: R A
authors.initials: RA
authors.lastname: Bennett
authors.forename: C L
authors.initials: CL
authors.lastname: Chrisman
mesh_terms: D000818:Animals; D004568:Electrodiagnosis / Q000662:veterinary; D008297:Male; D009431:Neural Conduction; D017933:Peripheral Nervous System / Q000502:physiology*; D012016:Reference Values; D020311:Rheiformes / Q000502:physiology*; D020305:Strigiformes / Q000502:physiology*