What is a concussion?
Concussion is a brain injury that may be caused by a direct blow to the head, face, neck or elsewhere on the body with an ‘‘impulsive’ force transmitted to the head. Concussions typically results in the quick onset of short-lived impairment of neurological function that resolves spontaneously. However, in some cases, symptoms and signs may evolve over minutes to hours.
Concussion symptoms reflect a disturbance in function, not a structural injury. No abnormality from concussion is seen on standard structural neuroimaging studies such as CT scans or MRIs. Concussion results in a number of symptoms that may or may not involve loss of consciousness or brief memory loss. Recovery from the mental and physical symptoms typically follows a sequential course. Current data reports that 80% of adult concussion resolve within 10 days, however it is important to note that in some cases, symptoms may be prolonged. (zurich consensus)