Simultaneous VEP and PERG investigations in early Parkinson's disease.

@article{Calzetti1990SimultaneousVA,
  title={Simultaneous VEP and PERG investigations in early Parkinson's disease.},
  author={Stefano Calzetti and Andrea Franchi and G Taratufolo and E Groppi},
  journal={Journal of neurology, neurosurgery, and psychiatry},
  year={1990},
  volume={53 2},
  pages={114-7}
}
To evaluate whether visual evoked potential (VEP) and pattern electroretinogram (PERG) abnormalities may be detectable early in the course of Parkinson's disease (PD) and to assess a possible interdependence between retinal and cortical potentials, simultaneous VEP and PERG were carried out in nine patients with early PD. The mean (SD) duration of the disease was 10 (6) months. None of the patients had been previously treated with levodopa or other anti-parkinsonian drugs. The results show VEP… CONTINUE READING

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