Ragnarsson, Kristjan T. Department of Rehabilitation Medicine, Mount Sinai School of Medicine, New York, New York.
Last reviewed:April 2020
Show previous versions
- Related Primary Literature
- Additional Reading
Mild traumatic brain injury resulting from externally inflicted trauma. Although concussion, or mild traumatic brain injury (TBI), has many symptoms, there is often no physical evidence of damage to the brain (see illustration). In most cases, a single concussion appears to be a relatively benign neurologic event, followed by a rapid and complete recovery within several days or 1–2 weeks. Concussion is clinically manifested by at least one of the following: (1) loss of consciousness for 30 minutes or less; (2) posttraumatic amnesia for less than 24 hours; (3) an initial score of 13 to 15 on the Glasgow Coma Scale, which measures eye, verbal, and motor responses [note that scores can range from 3 (deep coma) to 15 (fully awake)]; and (4) alteration in mental state at the time of injury (for example, feeling dazed, disoriented, or confused). See also: Amnesia; Brain; Consciousness; Trauma
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 10,000 highly qualified scientists and 46 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information