Dave's got a brain — he's pretty sure, anyway, since the MRI never mentioned otherwise — and this week he, with M3 Gizzy Lundquist and M2s Akshaj Joshi and Isa Perez-Sandi sit down with University of Oxford neurologist Masud Husain to talk about what happens when that brain stops working the way it's supposed to. Husain's new book, Our Brains, Ourselves: What a Neurologist's Patients Taught Him About the Brain, walks through seven patients whose identities came apart when a single cognitive process — memory, language, attention, motivation — went sideways. If you've got any interest in how brains and neurologists work, his book is a great read.