A patient is being admitted after sustaining a head injury from an acceleration/deceleration motor vehicle accident. The type of injury that this patient most likely sustained would be:
1. Skull fracture
2. Penetrating
3. Concussion
4. Coup–countercoup
4
Rationale 1: Skull fracture is not typically associated with motor vehicle accidents.
Rationale 2: Penetrating head trauma is not typically associated with motor vehicle accidents.
Rationale 3: Concussion is not typically associated with motor vehicle accidents.
Rationale 4: Contusions and axonal injuries often result from acceleration/deceleration injuries from a motor vehicle collision. Contusions develop as the brain accelerates against the fixed skull, causing disruption of the underlying cerebral parenchyma and blood vessels. This is known as a coup injury. After impacting the skull, the brain may recoil and impact the skull on the opposite side, causing additional damage to the cerebral parenchyma. This is known as a countercoup injury.
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