Air bags prevent concussions - and broken bones - and serious trauma of many kinds. For a normal-sized adult, in proper sitting position in an automobile seat, I seriously doubt an airbag would be capable of causing a concussion in and of itself. It's fabric is too soft, and it deflates a split second after it inflates.
A concussion.
No. A concussion is caused by a blow or fall on the head. Heat exhaustion is caused by staying too long in the heat.
Its very unlikely but possible. Why do you ask?
cerebrovascular accident
In motor vehicle accidents, concussion can occur without an actual blow to the head. Instead, concussion occurs because the skull suddenly decelerates or stops, which causes the brain to be jarred against the skull.
a concussion, internal bleeding
Only if the chest injury causes you to hit your head.
Young children are likely to suffer concussions from falls or collisions on the playground or around the home. Child abuse is, unfortunately, another common cause of concussion.
Post concussion syndrome is a diagnosis given to someone who has been affected by a concussion. These people exhibit persistent problems due to the concussion even after they should have healed.
A concussion
If concussions aren't treated properly (such as going to the hospital). The person with the concussion can develop what's called second impact syndrome. It's called this because if they get hit on the head again, it can cause follow-up brain bruising. Which can cause permanent damage to the brain.
A double concussion is a concussion that immediately follows the first concussion, or occurs before the injured party is asymptomatic.