Which of the following is a sign of spinal injury?

Weakness in the arms or legs is indeed a significant sign of spinal injury. This condition, known as motor weakness or paralysis, can occur when the spinal cord is damaged or compressed due to trauma such as a fall, car accident, or an assault. The spinal cord plays a critical role in transmitting motor signals from the brain to various parts of the body, and any injury to this pathway can result in a loss of movement or strength in the limbs.

Recognizing this symptom is crucial for first responders, as it may indicate severe underlying issues that require immediate medical attention. Prompt recognition and appropriate care can significantly impact the patient's outcome, making it an essential sign to know when evaluating potential spinal injuries.

In contrast, while increased heart rate, persistent coughing, and swelling in the abdomen may indicate various medical conditions, they are not specific indicators of spinal injury. They could relate to other medical emergencies or trauma situations but do not directly suggest damage to the spinal cord or surrounding structures.