MOVEMENT-DISORDERS IN THE EOSINOPHILIA-MYALGIA-SYNDROME - TREMOR, MYOCLONUS, AND MYOKYMIA

Objective. To describe the development of tremor, myoclonus, and myoky mia as chronic sequelae of eosinophilia-myalgia syndrome (EMS). Method s. Four patients among a cohort of 57 individuals with EMS followed pr ospectively were identified to have objective movement disorders. Elec trophysiologic findings were assessed by recording of electromyographi c activity from pairs of upper extremity antagonist muscles using 2 in put channels. Results. Clinical and electrophysiologic studies documen ted the presence of tremor (4 patients), myoclonus (3 patients), and m yokymia (1 patient) as late sequelae of EMS. Conclusion. The recogniti on of these movement disorders extends the spectrum of chronic neurolo gic disease in EMS.