1) Effects of cannabis on cognition in patients with multiple sclerosis and 2) Topic of the month: Critical care neurology. 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. Alex Menze interviews Dr. Anthony Feinstein about his paper on the effects of cannabis on cognition in patients with multiple sclerosis. Dr. James Addington is reading our e-Pearl of the week about spinal dural arteriovenous fistula. In the next part of the podcast Dr. Mike Brogan interviews Dr. Claude Hemphill about the management of intracranial hypertension. The participants had nothing to disclose except Drs. Feinstein, Addington and Hemphill.Dr. Feinstein serves as an editorial board member of Multiple Sclerosis and African Journal of Psychiatry; receives royalties from the publication of the book The Clinical Neuropsychiatry of Multiple Sclerosis; performs neuropsychiatric evaluation, cognitive testing, brain imaging in neuropsychiatry clinical practice; receives research support from Biogen Idec, Canadian Institute of Health Research, Multiple Sclerosis Society of Canada and University of Toronto; received honoraria for lectures from Merck Serono, Novartis and Teva Pharmaceutical Industries Ltd.Dr. Addington serves on the editorial team for the Neurology® Resident and Fellow Section. Dr. Hemphill serves as an editorial board member of Neurocritical Care; holds stock options for serving on the scientific advisory board for Ornim Medical; receives research support from Cerebrotech Medical; funding as PI for hub site for Neurological Emergencies Treatment Trials Network; received a one-time speaking honorarium from Besins Critical Care, LLC and honoraria from Edge Therapeutics, Inc. for consulting; gave expert witness review and testimony on various cases related to stroke and neurocritical care.