Scientists say they are on the cusp of developing blood tests that could detect the earliest signs of Alzheimer’s damage in people in their 40s and 50s who have no obvious symptoms. Today, finding out whether dangerous plaques are building up in your brain requires either a PET scan at a cost of about $4,000 or a spinal tap. And while genetic tests can help predict risk, they don’t tell us anything about the current state of your brain. Effective blood tests could reveal thousands — even millions — of people who are now living with a “pre-Alzheimer’s” condition. So you may be faced with some difficult choices within the next decade: Do you want to receive potentially alarming news about your cognitive health, or would you rather not? You can read the entire New York Times Sunday Review story HERE.