Final answer:
A concussion is the violent shaking up or jarring of the brain.
Step-by-step explanation:
The violent shaking up or jarring of the brain is known as concussion. A concussion occurs when there is a head injury that causes the brain to move rapidly back and forth inside the skull. This sudden movement can result in temporary changes in brain function, such as loss of consciousness, confusion, headaches, and dizziness.
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