title: Late Responses in the Electrodiagnosis of Cervical Radiculopathies.
abstract: This paper aims to assess the parameters of late responses and then determine their usefulness in patients with cervical radiculopathy.
  
  
  METHODS
  We studied a total of 114 patients with bilateral assessment of median and ulnar nerves and of F and A waves parameters.
  
  
  RESULTS
  We draw attention to the need of bilateral electrodiagnostic examination due to changes occurring in a third of cases also in the asymptomatic limb. Pluriradicular injuries occurred in one third of cases. The root that was most commonly affected in cases of uniradicular lesion was C7. The parameters with the most important alterations were persistence, tacheodispersion and chronodispersion, which were changed in about a half of the patients. With regard to the A wave, it occurred in a small number of cases, about 10%, with an average amplitude of about 120 μV and an average latency of 15ms. The distance from the point of stimulation where the collateral branch appeared was calculated to be approximately 35 cm.
  
  
  CONCLUSIONS
  Among the F wave parameters, persistence, tacheodispersion and chronodispersion are recommended to be studied; these parameters were also included in the composite score along with the AAEM recommendations.
authors.affiliation: Department of Medical and Surgical Specialities, Faculty of Medicine, Transilvania University of Brasov, Romania.
authors.forename: Ana Maria
authors.initials: AM
authors.lastname: Galamb
authors.affiliation: Department of Medical and Surgical Specialities, Faculty of Medicine, Transilvania University of Brasov, Romania.
authors.forename: Ioan Dan
authors.initials: ID
authors.lastname: Minea
keywords: cervical radiculopathies; composite score; late responses