MYOCLONUS IN CKCS Myoclonus is defined as a brief, jerk-like movement very similar to an electric shock due to involuntary contraction or relaxation of 1 or more muscles. A freshly published retrospective study in JVIM present a cohort of 39 CKCS with signs consistent with myoclonus of suspected cortical or subcortical origin. Affected CKCS were middle-aged to older with some of themn (13/39) suffering as well from generalised tonic-clonic seizures. In some of these dogs, the jerking movement of