Study sniffs Alzheimer’s link

A STUDY comparing data from a scratch-and-sniff test with imaging adds to the evidence associating a person’s poor ability to identify odours with neurodegeneration.

Among 215 healthy elderly adults participating in the US Harvard Aging Brain Study, researchers found deficits in the sense of smell were associated with decreased hippocampal volume and thinner entorhinal cortex on MRI.

There was also an association between low scores on the 40-item Pennsylvania Smell Identification Test and evidence of amyloid burden on PET scan, the authors said.

The study is just one of a growing number