1) Development and validation of a clinical guideline for diagnosing blepharospasm and 2) Topic of the month: AAN Plenary Sessions. This podcast for the Neurology Journal begins and closes with Dr. Robert Gross, Editor-in-Chief, briefly discussing highlighted articles from the print issue of Neurology. In the second segment Dr. Binit Shah interviews Dr. Giovanni Defazio about his paper on development and validation of a clinical guideline for diagnosing blepharospasm. Dr. Roy Strowd is reading our e-Pearl of the week about iatrogenic botulism. In the next part of the podcast Dr. Alberto Espay interviews Dr. Salvatore DiMauro about his Robert Wartenberg Lecture on Mitochondrial encephalomyopathies: 50 years on. The participants had nothing to disclose except Drs. Defazio, Strowd, Espay and DiMauro.Dr. Defazio receives research support from the Italian Ministry of University and Comitato Promotore Telethon.Dr. Strowd serves on the editorial team for the Neurology® Resident and Fellow Section. Dr. Espay is supported by the K23 career development award (NIMH, 1K23MH092735); has received grant support from CleveMed/Great Lakes Neurotechnologies, Davis Phinney Foundation, and Michael J Fox Foundation; is a consultant for Chelsea Therapeutics; serves on the scientific advisory boards for Solvay Pharmaceuticals, Inc., Abbott (now Abbie), Chelsea Therapeutics, TEVA Pharmaceutical Industries Ltd, Impax Pharmaceuticals, Merz Pharmaceuticals, LLC, Solstice Neurosciences, and Eli Lilly and Company, USWorldMeds; serves as Assistant Editor of Movement Disorders and on the editorial boards of The European Neurological Journal and Frontiers in Movement Disorders; serves on the speakers' bureaus of Novartis, UCB, TEVA Pharmaceutical Industries Ltd, American Academy of Neurology, Movement Disorder Society and receives royalties from Lippincott, Williams & Wilkins and Cambridge University Press.Dr. DiMauro serves as an editorial board member of Muscle and Nerve, Neuromuscular Disorders, Acta Myologica, MedLink Neurology; serves on the scientific advisory board for Telethon Italia; receives research support from the Muscular Dystrophy Association, Marriott Mitochondrial Disorder Clinical Research Fund and the NIH.