a positive declaration intended to give confidence: He received assurances of support for the project. 2. promise or pledge; guaranty; surety: He gave his assurance that the job would be done. 3. full confidence; freedom from doubt; certainty: to act in the assurance of success.
Summary. Traumatic brain injury (TBI) happens when a bump, blow, jolt, or other head injury causes damage to the brain. Every year, millions of people in the U.S. suffer brain injuries. More than half are bad enough that people must go to the hospital. The worst injuries can lead to permanent brain damage or death.
Brain injury is a condition in which the brain is damaged due to an injury. Brain injury often results when the head violently and suddenly hits an object or when an object deeply pierces the head. The symptoms of brain injury vary from mild to severe depending on how much the brain has been damaged. ...Read more.