It is commonly said that "elephants never forget". From the website Elephant Voices:

As strange as this may sound, currently, there is no good scientific test for Alzheimer’s disease. In other words, there is no specific blood test, spinal fluid test, or brain imaging study (MRI, CT, PET) that can definitely tell whether you have the disease or not.

“It is now possible to read someone’s mind by remotely measuring their brain activity with brain MRI scans, researchers have shown. The technique can even extract information from subjects that they are not aware of themselves.” (From

Much of the research that has gone into designing a test for Alzheimer’s disease has focused in on the brain. For example, scientists have tried to use MRI, MRS, and PET scans,as well as measuring the level of certain spinal fluid proteins.

However, new research indicates a quick and painless