title: Reliability of quantitative motor unit action potential parameters.
abstract: We evaluated the test-retest reliability (reproducibility) of motor unit action potential (MUAP) parameters in multi-MUAP analysis over time. Reproducibility studies are not available for needle quantitative electromyography (QEMG) performed by the same examiner. Fourteen consecutive individuals (10 men and 4 women) had repeat QEMG at 3 hours after the first examination, and seven (5 men and 2 women) had a repeat QEMG after 4-10 days. The intraclass correlation coefficient (ICC) was 87-97% with same-day testing and 52-81% with different-day testing. Size index and firing rate were the most reproducible, suggesting use in follow-up multi-MUAP studies.
authors.affiliation: Department of Rehabilitation Medicine, Hospital of the University of Pennsylvania, 3400 Spruce Street, Philadelphia, Pennsylvania 19104, USA.
authors.forename: Itaru
authors.initials: I
authors.lastname: Takehara
authors.forename: Jennifer
authors.initials: J
authors.lastname: Chu
authors.forename: Tung-Chou
authors.initials: TC
authors.lastname: Li
authors.forename: Ira
authors.initials: I
authors.lastname: Schwartz
mesh_terms: D000200:Action Potentials / Q000502:physiology*; D000328:Adult; D000368:Aged; D004594:Electrophysiology / Q000592:standards*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009046:Motor Neurons / Q000502:physiology*; D018482:Muscle, Skeletal / Q000294:innervation / Q000502:physiology; D009209:Myofascial Pain Syndromes / Q000175:diagnosis* / Q000503:physiopathology; D015203:Reproducibility of Results