1. How Early Can We Diagnose Alzheimer’s Disease (And Is It Sufficient)? 2. What's Trending: Updates to the International Classification of Headache Disorders (ICHD-3)Dr. Stacey Clardy talks with Dr. Ronald Petersen about his paper on Alzheimer disease diagnosis. In the second part of the podcast, Dr. Tesha Monteith focuses her interview with Dr. Jes Olesen on what's new in the 3rd edition of the International Classification of Headache Disorders (ICHD-3). The full ICHD-3 can be found at https://www.ichd-3.org/wp-content/uploads/2018/01/The-International-Classification-of-Headache-Disorders-3rd-Edition-2018.pdfDISCLOSURES: Dr. Clardy has received research support from Western Institute for Biomedical Research (WIBR). Dr. Petersen receives publishing royalties from Mild Cognitive Impairment (Oxford University Press, 2003); has consulted for Roche Incorporated, Merck, Genentech, Biogen, and GE Healthcare (presentation); and has received research support from the National Institute on Aging (U01-AG006786, P50-AG016574, U01-AG024904, U01 AG016976). Dr. Monteith serves as an editorial advisory board member for Neurology Now and receives research support from the NIH. Dr. Olesen has consulted for Jannsen Pharmaceutical Products and served on speakers' bureaus for Allergan.