Go to curiositystream.com/minute to get a free month trial with CuriosityStream and get a subscription to Nebula bundled in for free!   Experts can't agree on the definition of the term "concussion," which makes it difficult to diagnose, treat, and research this important brain injury.    Thanks also to our Patreon patrons https://www.patreon.com/MinuteEarth and our YouTube members. ___________________________________________ To learn more, start your googling with these keywords:  Chronic traumatic encephalopathy: a progressive degenerative disease of the brain found in people with a history of repetitive brain trauma (often athletes)Traumatic brain injury (TBI): a disruption in the normal function of the brain that can be caused by a bump, blow, or jolt to the head, or penetrating head injurySubdural hematoma: a collection of blood between the layers of tissue that surround the brainCerebral microbleeding: small chronic brain hemorrhages which are likely caused by structural abnormalities of the small vessels of the brain  ___________________________________________ If you liked this week’s video, you might also like:  Everything we know about concussions is wrong – https://qz.com/1136683/everything-we-know-about-concussions-is-wrong/ _________________________________________ Subscribe to MinuteEarth on YouTube: Support us on Patreon: And visit our website: https://www.minuteearth.com/   Say hello on Facebook: http://goo.gl/FpAvo6 And Twitter: http://goo.gl/Y1aWVC   And download our videos on itunes:  https://goo.gl/sfwS6n ___________________________________________ Credits (and Twitter handles): Script Writer, Video Director, Narrator: Julián Gustavo Gómez (@ittakesii) Video Illustrator: Sarah Berman (@sarahjberman) With Contributions From: Henry Reich, Alex Reich, Kate Yoshida, Ever Salazar, Peter Reich, David Goldenberg, Arcadi Garcia Rius  Music by: Nathaniel Schroeder: ___________________________________________   References: Rasmussen, Carly, et al. "How Dangerous Are Youth Sports for the Brain: A Review of the Evidence." Berkeley J. Ent. & Sports L. 7 (2018): 67. - https://scholarship.law.berkeley.edu/cgi/viewcontent.cgi?article=1077&context=bjesl Shen, Francis X. "Are youth sports concussion statutes working." Duq. L. Rev. 56 (2018): 7. - https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3172294 Sharp, David J., and Peter O. Jenkins. "Concussion is confusing us all." Practical neurology 15.3 (2015): 172-186. - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4453625/ Tator, Charles H. "Concussions and their consequences: current diagnosis, management and prevention." CMAJ 185.11 (2013): 975-979. - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3735746/ Whitelaw, A. S., and I. Young. "A case of perilymphatic fistula in blunt head injury." Emergency medicine journal 22.12 (2005): 921-921. - https://emj.bmj.com/content/22/12/921Mason, Peggy. “Concussion Is a Counter-Productive Term: Let's Retire It.” The Brain Is Sooooo Cool!, 5 July 2015, https://thebrainissocool.com/2015/07/05/concussion-is-a-counter-productive-term-lets-retire-it/ Haller, Sven, et al. "Cerebral microbleeds: imaging and clinical significance." Radiology 287.1 (2018): 11-28. - https://pubs.rsna.org/doi/10.1148/radiol.2018170803 Goldenbaum, Ellen. “Is It Really a Concussion? Symptoms Overlap with Neck Injuries, Making Diagnosis a Tough Call.” UB News Center, 29 July 2014, http://www.buffalo.edu/news/releases/2014/07/040.html