When rolling a casualty, what should you do with the hand that is not supporting the head and neck?

When rolling a casualty, the hand that is not supporting the head and neck should be used to reach across the casualty's chest and pull them toward you. This technique is important because it helps to maintain the alignment of the casualty's body, minimizing the risk of further injury, particularly to the spine. By using this method, you can roll the casualty smoothly while providing support to their head and neck. The additional force from pulling them closer allows for better control and stability during the roll, ensuring that the casualty is moved safely without aggravating any potential injuries.

In this context, holding the torso steady might hinder the roll or increase the risk of injury since it does not actively assist in the motion. Placing the hand on the ground for balance does not contribute to a safe or efficient roll of the casualty, as it simply anchors that hand without providing necessary support. Keeping the hand raised above the casualty's head would also be ineffective, as it does not aid in the rolling process and may lead to a lack of support for the casualty's body during the maneuver.