In this special episode, Dr. Sarah Song returns as a guest co-host to talk with Dr. Roy Hamilton, behavioral neurologist and professor of neurology, physical medicine and rehabilitation, and psychiatry and director of the Laboratory for Cognition and Neural Stimulation (LCNS) at the University of Pennsylvania. Dr. Hamilton discusses agnosia—a rare neurologic disorder characterized by an inability to recognize and identify objects or persons. Dr. Hamilton explains the various types of agnosia, which parts of the brain are affected, and how it is treated.  Additional Resources  Learn more about agnosia  Learn more about prosopagnosia   Brain & Life: What is Agnosia? Understanding the Causes and Symptoms  We want to hear from you!  Have a question or want to hear a topic featured on the Brain & Life Podcast?  Record a voicemail at 612-928-6206  Email us at BLpodcast@brainandlife.org  Social Media:   Guest: Dr. Roy Hamilton @DrRoyHamilton (Twitter)  Host(s): Dr. Daniel Correa @neurodrcorrea; Dr. Sarah Song @Stroke_doc