Which in-line stabilization technique should you use when placing a responsive victim with a suspected head, neck, or spinal injury on a backboard?

Using the over-arm head splint technique is the appropriate choice for stabilizing a responsive victim with a suspected head, neck, or spinal injury while placing them on a backboard. This technique involves holding the victim's head and neck in a stable position to prevent any potential movement that could exacerbate their injury. By using your arms to secure the head in line with the spine, you help maintain the natural alignment of their body, reducing the risk of further injury during the transfer to the backboard.

Maintaining this alignment is crucial, as any unnecessary movement of the head or neck can lead to increased risk for spinal cord damage. The over-arm head splint technique allows for effective communication with the victim, who can respond to questions and provide feedback, which is especially important when assessing their condition.

Other techniques, like the front-arm support or the head tilt maneuver, do not provide the same level of stabilization or alignment needed for someone with a suspected injury to the cervical spine. These methods may inadvertently allow for head movement, which can be dangerous. The rear-lift method might not adequately secure the head and neck when placing a responsive victim on a backboard, making it less suitable for this particular situation.