myoclonic

Adjective

 * 1) Of or pertaining to myoclonus; consisting of or characterized by sudden jerking motions.
 * 2) * 1891, James Hendrie Lloyd, “Report of Two Cases of Rare Myoclonic Disorder”, paper to be read at the Seventh Annual Meeting of the American Neurological Association, 1891 September 22-24, listed in George F. Shrady (editor), Medical Record volume 40, William Wood &amp; Company, number 1, 1891 July 4.