In the latest Alert Diver (Spring 2013), the membership magazine published by DAN, there's an article "Effects of Diving on the Brain" starting page 46. A one sentence synopsis is that there are some interesting brain pathologies observed in some divers, but no causal relationship is established, and there is no recommendation to limit diving associated with these observations.
In the second paragraph on page 47, in a statement by Kay Tetzlaff, identified as an M.D. and Associate Professor of Medicine in the department of sports medicine at the University of Tuebingen, Germany, consultant in diving and hyperbaric medicine, author of numerous technical papers, and editor of textbooks on diving medicine:
"... A fundamental flaw in study design has been the possibility of a selection bias, in that the lesions in the selected divers could have been pre-existing. In fact, the studies could not disprove a hypothesis that the decision to start diving may be the first sign of brain damage. ..."
That would explain a lot, eh?
In the second paragraph on page 47, in a statement by Kay Tetzlaff, identified as an M.D. and Associate Professor of Medicine in the department of sports medicine at the University of Tuebingen, Germany, consultant in diving and hyperbaric medicine, author of numerous technical papers, and editor of textbooks on diving medicine:
"... A fundamental flaw in study design has been the possibility of a selection bias, in that the lesions in the selected divers could have been pre-existing. In fact, the studies could not disprove a hypothesis that the decision to start diving may be the first sign of brain damage. ..."
That would explain a lot, eh?
