1) Long-term safety and effectiveness of natalizumab for re-dosing and treatment of multiple sclerosis and 2) Topic of the month: Plenary sessions AAN Meeting April 2014. 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. Ruth Ann Marrie interviews Dr. Paul O'Connor about his paper on long-term safety and effectiveness of natalizumab for re-dosing and treatment of multiple sclerosis. Dr. James Addington is reading our e-Pearl of the week about inclusion body myositis. In the next part of the podcast Dr. Alberto Espay interviews Dr. James Bernat about his Presidential Lecture at the AAN Meeting about challenges to ethics and professionalism facing the contemporary neurologist. The participants had nothing to disclose except Drs. Marrie, O'Connor, Addington, Espay and Bernat.Dr. Marrie serves on the editorial board for Neurology® and Multiple Sclerosis Journal; receives research support from Sanofi-aventis, Canadian Institutes of Health Research, Public Health Agency of Canada, Multiple Sclerosis Society of Canada, National Multiple Sclerosis Society, Multiple Sclerosis Scientific Foundation and Consortium of Multiple Sclerosis Centers.Dr. O'Connor served on the editorial advisory board of the MS Journal; serves on the scientific advisory board for Novartis, Sanofi-aventis, Bravo Pharmaceuticals, Genentech, Inc., Roche and Actelion Pharmaceuticals Ltd; is a consultant for Biogen Idec, Teva Pharmaceutical Industries Ltd., Sanofi-aventis and Novartis; received funding for travel to advisory board meeting in Toronto; receives research support from Novartis, Sanofi-aventis, Roche, Biogen Idec and as National Scientific and Clinical Advisor to the MS Society of Canada. Dr. Addington serves on the editorial team for the Neurology® Resident and Fellow Section. Dr. Espay serves as an Associate Editor of Movement Disorders, Frontiers in Movement Disorders and Journal of Clinical Movement Disorders; serves as an editorial board member of Parkinsonism and Related Disorders and The European Neurological Journal; receives royalties for publications of books from Lippincott, Williams & Wilkins and from Cambridge University Press; serves on the scientific advisory board for Solvay Pharmaceuticals, Inc. (now Abbvie), Chelsea Therapeutics, Teva Pharmaceutical Industries Ltd., Impax Pharmaceuticals, Merz, Pfizer Inc, Solstice Neurosciences, LLC, Eli Lilly and Company, US WorldMeds; is a consultant for Chelsea Therapeutics, Solvay Pharmaceuticals, Inc. (now Abbvie); serves on the speakers' bureaus of Novartis, UCB, Teva Pharmaceutical Industries Ltd., American Academy of Neurology, Movement Disorders Society; receives research support from CleveMed/Great Lakes Neurotechnologies, Michael J. Fox Foundation and the NIH.Dr. Bernat serves as an unpaid editorial board member of Neurocritical Care, Neurology Today, and Multiple Sclerosis and Related Diseases; a paid editorial board member of The Physician's Index for Ethics and Medicine; and receives royalties from the publication of the books Ethical Issues in Neurology, 3rd ed, Palliative Care in Neurology, and Ethical and Legal Issues in Neurology.