Maybe not, see the bottom of the post.
http://news.yahoo.com/researchers-peanut-butter-diagnose-alzheimers-disease-171900738.html
Florida researchers have come up with a novel way to help diagnose Alzheimer's disease. They use peanut butter and a ruler.
These unusual tools provide a way for scientists to test subjects for smell sensitivity, according to ScienceDaily. In Alzheimer's patients, one of the first locations in the brain to experience degeneration is the front part of the temporal lobe, which evolved from the olfactory system. It's linked to the ability to create new memories.
University of Florida graduate student Jennifer Stamps noted that the staff did not evaluate the sense of smell of subjects tested at the university's McKnight Brain Institute Center. This sense derives from the first cranial nerve, often one of the first things disturbed during a cognitive decline.
Stamps created a simple peanut butter test used on 68 patients with cognitive impairment, plus 26 control subjects. Findings appeared in the Journal of the Neurological Sciences.
More at link.
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