When a health-care professional is present, they can extend the allowed injury time for head and neck injuries to a maximum of how long?

When a health-care professional is present, they can extend the allowed injury time for head and neck injuries to a maximum of five minutes. This provision is crucial because head and neck injuries can have significant implications for an athlete's health and safety. The extended time allows medical personnel to conduct a thorough assessment of the athlete’s condition and make informed decisions regarding their ability to continue competing. Ensuring that athletes receive appropriate care in these situations is vital to prevent further injury or complications.

The maximum extension is significant because it respects the need for thorough medical evaluation while balancing the competitive nature of the sport. A time limit of five minutes provides enough opportunity for a medical examination while still keeping in line with the flow of the event. Other options such as two, three, or four minutes may not afford adequate time for a proper assessment, particularly given the complexities associated with head and neck injuries, which can sometimes have delayed symptoms or require more extensive evaluation.