A series of electrical and chemical changes developing over a period of hours, result in changes to blood flow, the metabolism and the ionic balance in the brain.
Brain cells communicate with each other both electronically and chemically. Trauma can disrupt the electrical and chemical balance, with the result that brain cells set off the wrong signals, which can damage or destroy the cell.

The concussions that disable, are almost always more symptomatic at 24 hours, than at the 2-4 hour time frame when injured persons are evaluated in the emergency room. Brain injury symptoms escalate over the first 24 hours, because brain injury involves a cascade of events. It is critical that if you are still symptomatic the day after your injury, go back to the same Emergency Room, don’t wait for a doctors appointment. It is critical that the Emergency Room personnel see that the symptoms still persist or have gotten worse.