1) Featured Article: Collateral response modulates the time–penumbra relationship in proximal arterial occlusions2) Lesson of the Week: Migraine and neuromodulationThis podcast begins and closes with Dr. Robert Gross, Editor-in-Chief, briefly discussing highlighted articles from the January 23, 2018, issue of Neurology. In the first segment, Dr. Kevin Barrett talks with Dr. Smriti Agarwal about her paper on collateral circulation in proximal arterial occlusions and extending the scope of thrombolytic therapy. In the second part of the podcast, Dr. Teshamae Monteith focuses her Lesson of the Week interview with Dr. Stewart Tepper on acute and preventative neuromodulation treatment for migraine. DISCLOSURES: Dr. Barrett serves on the editorial board of Neurology and Neurohospitalist; has received research/grant support from the National Institute of Neurological Disorders and Stroke for serving on the executive committees of the CREST-2 and SHINE clinical trials; and receives publishing royalties from Wiley Blackwell.Dr. Agarwal reports no disclosures.Dr. Monteith serves as an editorial advisory board member for Neurology Now and receives research support from the NIH.Dr. Tepper is a member of the board for the American Headache Society and has been a consultant for or participated on a paid advisory board for Acorda Therapeutics, Inc; Alder BioPharmaceuticals, Inc; Allergan plc; Amgen, Inc; Avanir Pharmaceuticals, Inc; BioVision, Inc; Charleston Laboratories, Inc; Dr. Reddy’s Laboratories, Ltd; electroCore, LLC; eNeura, Inc; Eli Lilly and Company; GLG Pharma, LLC; Guidepoint Inc, LLC, Ltd; Kimberly-Clark Corporation; Pernix Therapeutics Holdings, Inc; Pfizer, Inc; Scion NeuroStim, LLC; Teva Pharmaceutical Industries, Ltd; and Zosano Pharma, Corp.