A concussion is a brain injury resulting from an abrupt hit to the head. It causes the head and brain to move back and forth quickly, resulting in a chemical change in the brain.
Source
The Karaoke Lowdown
The Karaoke Lowdown
A concussion is a brain injury resulting from an abrupt hit to the head. It causes the head and brain to move back and forth quickly, resulting in a chemical change in the brain.
Source
