What EEG criteria for diving fitness?

The authors have tried to consider EEG criteria applicable to fitness for diving. In a study of 90 professional divers, 37 (41%) displayed patterns susceptible of being interpreted as falling outside of strict normalcy. These patterns have sometimes been considered incompatible with diving, or even pathological by some authors. Considering the fact that these subjects were in good health, the value of these EEG signs is discussed in comparison with the literature. A general guideline is proposed placing subjects in three groups: fit, unfit, and questionable. In the last case, a final decision is taken in each individual case in agreement with the other medical examinations and based on the type of diving considered. Some explicit EEG criteria of definitive or temporary fitness and unfitness are proposed.