Man hit by a car is thrown up and hits road divider falls on the ground sustains head injury then run over by another car. Cause of head injury is
**Core Concept**
The question tests the understanding of the mechanism of head injury, specifically the concept of coup and contrecoup injuries. Coup injuries occur at the site of direct impact, while contrecoup injuries occur on the opposite side of the head due to the brain's inertia and the force of the impact.
**Why the Correct Answer is Right**
In this scenario, the man first hits the road divider, causing a direct impact to the head, which results in a coup injury. However, as he falls to the ground, his brain continues to move forward due to its inertia, resulting in a contrecoup injury on the opposite side of the head. This is because the brain's movement is not immediately stopped by the skull, allowing it to continue moving and causing damage on the opposite side.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify the mechanism of injury, which is essential in determining the type of head injury.
* **Option B:** This option is incorrect because it implies that the head injury was caused solely by the second car running over the man, which is not the case.
* **Option C:** This option is incorrect because it suggests that the head injury was caused by the man hitting the ground, which is not the primary mechanism of injury.
**Clinical Pearl / High-Yield Fact**
It's essential to remember the mechanism of injury and the concept of coup and contrecoup injuries when evaluating head trauma cases. This knowledge helps in identifying the potential areas of injury and guiding further management.
**Correct Answer: C. Contrecoup injury.**