The medical definition of "concussion" needs be quantitative and non-static. It also needs to have clinical utility.
See more of Dr. Ghajar's videos here.
Posted on BrainLine February 2, 2012.
Produced by Noel Gunther and Justin Rhodes, BrainLine.
About the author: Jamshid Ghajar, MD, PhD
Jamshid Ghajar, MD, PhD is chief of Neurosurgery at Jamaica Hospital-Cornell Trauma Center, clinical professor of Neurosurgery at Weill Cornell Medical College and president of the Brain Trauma Foundation.
![Jamshid Ghajar](https://www.brainline.org/sites/default/files/migrated/Ghajar_0.jpg)