Key points from article :
Study published in the BMJ finds 8 to 12 drinks a week is associated with cognitive decline.
Brain scans show degeneration and shrinking of the hippocampus, a region of the brain involved in memory and navigation.
Consuming one more alcoholic drink per week was associated with a 0.01 percent reduction.
For comparison, aging one year was associated with a 0.02 percent decrease.
