Not a typo in the subject, just a lame play on words.
These studies show the brain is apparently altered from exposure to high altitude / low oxygen. In some cases the effects are long-term. These studies were conducted at much higher elevations than Whitney, but the results are interesting. Makes the case for a good acclimation plan and taking even mild AMS seriously.
Three attributes of a good mountaineer are high pain threshold, bad memory, and ... I forget the third. Into Thin Air 2008 Reversible brain abnormalities - without AMS, 2016 Longterm effects, 2012
