The term concussion refers to a mild traumatic brain injury (MTBI) resulting in a temporary loss of awareness or conciousness. Concussions can result from falls in which the head strikes against an object, or when a moving object strikes the head. The length of unconciousness may relate to the severity of the concussion, and affected individuals often have no memory of the events preceding the injury or immediately after regaining consciousness. Other symptoms include vomiting and unequally sized pupils.
Concussions are classified into five grades, as follows.
Grade I: Involves only confusion.
Grade II: Involves anterograde amnesia of less than five minutes as well as confusion.
Grade III: Involves the Grade I and II symptoms as well as retrograde amnesia and unconciousness lasting up to 5 minutes.
Grade IV: Involves the Grade I, II, and III symptoms as well as unconciousness lasting 5-10 minutes.
Grade V: Same as Grade IV, except unconciousness lasts longer than 10 minutes.
Treatment: The best recovery technique is rest. The best course of action varies with the severity of the concussion, and a trained medical professional should be consulted for guidance.