title: Posterior tibial nerve somatosensory cortical evoked potentials in adolescent idiopathic scoliosis.
abstract: METHODS
  Somatosensory-evoked potentials were used to evaluate neurologic function in patients with adolescent idiopathic scoliosis.
  
  
  OBJECTIVE
  To compare the somatosensory-evoked potentials between patients with adolescent idiopathic scoliosis and healthy control individuals, and to determine the incidence of abnormal somatosensory function in patients with adolescent idiopathic scoliosis.
  
  
  BACKGROUND
  Somatosensory-evoked potentials are sensitive in detecting structural lesions in the somatosensory pathway. Previous studies on somatosensory function in patients with idiopathic scoliosis have demonstrated statistical differences in somatosensory-evoked potential latency between scoliotic and normal groups. However, no documentation of the actual incidence of abnormal somatosensory-evoked potentials is available.
  
  
  METHODS
  Posterior tibial nerve somatosensory cortical evoked potentials were evaluated on 147 young patients with adolescent idiopathic scoliosis and 31 healthy control individuals.
  
  
  RESULTS
  Seventeen patients with idiopathic scoliosis showed pathologic evoked potentials. Among them were seven with absent somatosensory-evoked potential waveform and 10 with delayed latency. The results were reproducible on repeated measurement.
  
  
  CONCLUSIONS
  Adolescent idiopathic scoliosis could be subdivided according to the somatosensory-evoked potential findings into two subgroups, those with and those without a somatosensory pathologic process. Potential clinical significance in predicting curve progression in idiopathic scoliosis could be pursued further.
authors.affiliation: Department of Orthopaedics and Traumatology, Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong.
authors.forename: J C
authors.initials: JC
authors.lastname: Cheng
authors.forename: X
authors.initials: X
authors.lastname: Guo
authors.forename: A H
authors.initials: AH
authors.lastname: Sher
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D004576:Electromyography; D005073:Evoked Potentials, Somatosensory / Q000502:physiology*; D005260:Female; D005625:Frontal Lobe / Q000503:physiopathology*; D006801:Humans; D008297:Male; D011930:Reaction Time / Q000502:physiology; D012600:Scoliosis / Q000503:physiopathology*; D012727:Sex Characteristics; D013979:Tibial Nerve / Q000502:physiology*