How does deceleration injury occur?

How does deceleration injury occur?

• A. A brain motion problem occurs when the head stops suddenly.
• B. When the moving head is suddenly stopped or hits a stationary object.
• C. The skull is crushed by impact.
• D. There is no injury due to deceleration.

Answer: (B)

In deceleration injuries, the contrast between what happens to the brain and what happens to the skull is key. When the head is moving and is suddenly stopped or slams into a stationary object, the brain, due to inertia, continues to move inside the skull. That continued motion makes the brain collide with the inner surfaces of the skull and undergo shear and stretching of neural and vascular tissue. The result is brain injury that can be diffuse and widespread, even if the skull itself isn’t crushed or fractured. This mechanism explains why an abrupt stop or collision with a stationary object is the classic description of deceleration injury. It’s different from a direct impact that crushes the skull, and it means injury can occur without visible skull fracture.

In deceleration injuries, the contrast between what happens to the brain and what happens to the skull is key. When the head is moving and is suddenly stopped or slams into a stationary object, the brain, due to inertia, continues to move inside the skull. That continued motion makes the brain collide with the inner surfaces of the skull and undergo shear and stretching of neural and vascular tissue. The result is brain injury that can be diffuse and widespread, even if the skull itself isn’t crushed or fractured.

This mechanism explains why an abrupt stop or collision with a stationary object is the classic description of deceleration injury. It’s different from a direct impact that crushes the skull, and it means injury can occur without visible skull fracture.