http://www.sciencedaily.com/releases/1999/07/990728073646.htm

A Mayo Clinic study has shown that 50 percent of a group of elderly
patients with mild cognitive impairment who also have a significantly
smaller hippocampus portion of the brain are likely to develop
Alzheimer's disease as compared to nine percent of patients with a
normal size hippocampus

http://www.defeatdiabetes.org/Archives%20of%20News/march2003.htm

Sustained High Blood Sugar Levels May Damage Brain's Key Memory Center
(03/10/03) An inability to quickly bring down high levels of sugar in
the blood is associated with poor memory and may help explain some of
the memory loss that occurs as we age, according to a new study. The
Study raises the possibility that exercise and weight loss, which help
control blood sugar levels, may be able to reverse some of the memory
loss that accompanies aging. The study is the first to show an
association between the size of the hippocampus, a key brain structure
for learning and memory, and the ability to control blood sugar levels
in the body, according to the researchers.

http://diabetes.about.com/cs/hyperglycemia/a/blnmemory03.htm

"For every person with Alzheimer's disease, there are some 8 people
with memory problems sufficient to affect the quality of their lives
who don't go on to develop dementia," says Dr. Convit. "Our work seeks
to understand what other medical factors influence memory in aging."
In fact, says Dr. Convit, there are now more than 20 reports in the
medical literature demonstrating that diabetics experience memory and
learning problems that cannot be explained away by the presence of
other conditions such as cardiovascular disease, which are often
associated with diabetes. Diabetics have very high levels of glucose
in the blood because the sugar cannot enter their tissues, where it is
broken down to do useful work.

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What other damage are we doing to ourselves with a high carb diet?

TC