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[The Vasalva manoeuvre and the E.E.G. in a study of professional and trainee diverse (author's transl)].

The E.E.G., the oculocardiac reflex (OCR), the Valsalva manoeuvre and respiratory capacity, were studied and compared in 183 professional or trainee divers. There was a positive correlation between an alpha rhythm at or below 9 c/sec and a positive OCR. The Valsalva was more often positive in young subjects and trainee divers than in older subjects and professional divers. Also the Valsalva response was more likely to be positive when the subject's respiratory capacity was greater. These observations are used to make conclusions about the significance of a positive response to the Valsalva manoeuvre and about the value that can be attached to these various tests in subject selection.