paroxysmal dyskinesia symptomsparoxysmal nonkinesigenic dyskinesiaparoxysmal hypnogenic dyskinesiaparoxysmal dyskinesia dogparoxysmal kinesigenickinesigenic dyskinesianonkinesigenic dyskinesiapkd paroxysmal kinesigenic dyskinesiaparoxysmal kinesigenic choreoathetosisparoxysmal kinesigenic dystoniaparoxysmal dystonic choreoathetosisparoxysmal movement disorder