Thick Cortex Offers Clue to Better Memory

Fascinating topic with no clues as to how to get that way. Read it all at the link.
http://www.medpagetoday.com/Geriatrics/GeneralGeriatrics/34269
Investigators have found no common environmental factors to explain the cortical thickening. Some patients smoked, others didn't. Some regularly consumed alcohol, others never drank. Some exercised regularly, some never exercised. Some were financially secure, and others had struggled financially throughout their lives.
"We can't say eat a cup of blueberries or drink a glass of wine and you'll have better memory," said Rogalski.
Investigators also have yet to analyze data on mind-stimulating activities that might account for differences in memory, such as reading or playing chess.


I wonder what the definition of thick is. Or did they have this better memory since birth. Inquiring minds want to know.  Stump your doctor with this question.