It’s not just a headache. It is more complex than that. There are gender differences especially for athletes. The Old Guy goes into great detail about concussions and their treatment.

Dr. Cárdenas is the director of the Barrow Concussion and Brain Injury Center; an inter-disciplinary clinic that is nationally recognized for comprehensive patient care. Since 2009, the Center has treated thousands of individuals suffering from traumatic brain injury due to sports, accidents, and domestic violence.

He is also the director of the Barrow Concussion Network, the most comprehensive statewide concussion education, prevention, and treatment program in the United States. Dr. Cárdenas provides sideline concussion coverage for Arizona State University and the National Football League.

He serves on the NFL’s Head, Neck & Spine Committee, the Sport Medical Advisory Committee of the National Federation of High Schools, is chair of the Arizona Interscholastic Association Sport Medical Advisory Committee, and member of the Arizona Governor's Council on Spinal and Head Injuries. He was awarded Arizona State University's Young Alumni award in 2014, the 2015 American Academy of Neurology Advocate Year.