Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

  • Nearly 3,000 illustrations, including video clips of neurologic disorders.

  • Every article is reviewed by our esteemed Editorial Board for accuracy and currency.

  • Full spectrum of neurology in 1,200 comprehensive articles.

Action myoclonus in Unverricht-Lundborg disease)

(a) On execution of a requested movement (“raise your right hand toward the head”) intense repeated myoclonias maximal in the agonist arm muscles are followed by atonias of long (more than 500 ms) duration, with or without multiple spikes and slow waves on the EEG. (b) Erratic-fragmentary myoclonus at rest: asynchronous in agonist and antagonist muscles, with or without overt EEG correlate (back-average analysis, not performed here, may be useful to unveil eventual EEG potentials). (Courtesy of Dr. C A Tassinari. From: Tassinari CA, Cantalupo G, Rubboli G. Polygraphic recording of epileptic seizures. In: Panayiotopoulos CP, editor. Atlas of epilepsies. London: Springer, 2010:723-40.)