These studies presented by Glasshead are quite common in that they did not normalize the studied cohort. In fact, some may have had bias from the start due to the selection process.

The concept that developing or strengthening lazy brain functions may be the cause of the measured improvement still fits.

Brain training and neuroscience start-ups are the new dot coms of this decade.

Most of the studies even claimed a need for further study with larger groups and also a lack of understanding how these improvements will impact daily life.

The HBOT industry is a good example. They show that 40 to 80 HBOT treatments results in an increase in the capillary blood flow thought to be caused by an increase in the number of capillaries.

Altitude training shows the same. Sleep therapy with reduced oxygen content similar to an 8000 foot altitude results in the same increase in capillary growth.

So, if the money is not an issue, go for it. Just don't knock yourself out.

Glasshead is right that there has not been any studies published that relate this to a damaged brain.