Nonepileptic Myoclonus in COVID-19: Case Report

In late 2019, the novel coronavirus, SARS-CoV-2, and the disease it causes, COVID-19, was identified. Since then many different neurological manifestations of COVID-19 have been well reported. Movement abnormalities have been rarely described. We report here a critically ill patient with COVID-19 who developed generalized myoclonus during the recovery phase of the infection. Myoclonus was associated with cyclical fevers and decreased alertness. Movements were refractory to conventional anti-epileptic therapies. There was concern that myoclonus could be part of a post-infectious immune-mediated syndrome. The patient improved fully with a 4-day course of high-dose steroids. Our experience highlights a rare, generalized myoclonus syndrome associated with COVID-19 that may be immune-mediated and is responsive to treatment.