Will there always be signs of a convulsive diver before it occurs?

• A. Yes
• B. No, it can happen spontaneously with no warning signs
• C. Sometimes
• D. Only with warning signs

Answer: (B)

Convulsions can strike a diver without any reliable warning. Seizures caused by cerebral involvement from diving injuries, such as brain-depending decompression effects or gas embolism, can occur suddenly, leaving little or no time for the diver to react. While some events may have an aura or brief signs, these are not consistent predictors, so you can’t count on warning signs every time. This unpredictability is why rapid, protective action is essential as soon as a convulsive event is observed: get the diver to the surface safely, protect the head, ensure the airway, and seek medical help promptly.