John Libbey Eurotext

Epileptic Disorders

The Educational Journal of the International League Against Epilepsy

Prominent eye muscle artefact on the EEG of a patient with Hashimoto thyroiditis with primary hypothyroidism Volume 19, issue 4, December 2017

Figures

Authors
1 Children's Hospital of Los Angeles - Neurology, Los Angeles, California 90027-6016, USA
* Correspondence
  • Key words: Hashimoto thyroiditis, EEG artefacts
  • DOI : 10.1684/epd.2017.0940
  • Page(s) : 491
  • Published in: 2017

For details visit the Multimedia Teaching Material/EEG Section of the website www.epilepticdisorders.com. A 15-year-old boy with Hashimoto's thyroiditis presented with a paroxysmal episode. The EEG demonstrated prominent superior and lateral rectus muscle artefacts, superimposed on a normal background. Since seizures are known to occur in patients with thyroiditis, correct interpretation of the interictal EEG was very important. Initially, the frontal discharges may have been mistaken for epileptiform [...]