RELEASE ISSUED BY: American Academy of Neurology
MINNEAPOLIS—March 16, 2016—Women may have a better memory for words than men despite evidence of similar levels of shrinkage in areas of the brain that show the earliest signs of Alzheimer’s disease, according to a study published today in the online issue of Neurology, the medical journal of the American Academy of Neurology.
Erin Sundermann, Ph.D.According to study author Erin E. Sundermann, Ph.D., a postdoctoral fellow in the lab of Richard Lipton, M.D., “One way to interpret the results is that because women have better verbal memory skills than men throughout life, women have a buffer of protection against loss of verbal memory before the effects of Alzheimer’s disease kick in. Because verbal memory tests are used to diagnose people with Alzheimer’s disease and its precursor, mild cognitive impairment, these tests may fail to detect mild cognitive impairment and Alzheimer’s disease in women until they are further along in the disease.”
The research was conducted in the Einstein Aging Study, which is directed by Dr. Lipton, vice chair of neurology at Einstein and Montefiore. The study included participants from the Alzheimer’s Disease Neuroimaging Initiative: 235 people with Alzheimer’s disease, 694 people with mild cognitive impairment that included memory problems, and 379 people with no memory or thinking problems. The groups’ performance on a test of verbal memory was compared to the size of the hippocampal area of the brain, which is responsible for verbal memory and affected in the early stages of Alzheimer’s disease.
Women performed better than men on the tests of both immediate recall and delayed recall among those showing evidence of minimal to moderate amounts of hippocampal shrinkage. At the high level of hippocampal shrinkage, there was no difference in the scores of men and women. At the score that indicates the start of verbal memory impairment, or 37 on a scale of zero to 75 for immediate recall, women showed greater evidence of hippocampal shrinkage (ratio of hippocampal volume to total brain volume by 103 was 5, compared to 6 for men).
“If these results are confirmed, then we may need to adjust memory tests to account for the difference between men and women in order to improve our accuracy in diagnosis.”– Erin Sundermann, Ph.D.
“If these results are confirmed, then we may need to adjust memory tests to account for the difference between men and women in order to improve our accuracy in diagnosis,” said Dr. Sundermann.
The Alzheimer’s Disease Neuroimaging Initiative was supported by the National Institute on Aging, National Institute of Biomedical Imaging and Bioengineering, Alzheimer’s Association, Alzheimer’s Drug Discovery Foundation, U.S. Food and Drug Administration, Abbott, Amorfix Life Sciences, AstraZeneca, Bayer HealthCare, BioClinica, Biogen Idec, Bristol-Myers Squibb, Eisai, Elan Pharmaceuticals, Eli Lilly, F. Hoffmann-La Roche and Genentech, GE Healthcare, Innogenetics, IXICO, Janssen Alzheimer Immunotherapy Research and Development, Johnson and Johnson Pharmaceutical Research and Development, Medpace, Merck, Meso Scale Diagnostics, Novartis Pharmaceuticals; Pfizer, Servier, Synarc and Takeda Pharmaceutical.The Einstein Aging Study is supported by the National Institute on Aging.