A simple at-home brainwave test can detect signs of memory impairment linked to Alzheimer's disease years before clinical diagnosis is typically possible.

This feat has been demonstrated by researchers from the universities of Bath and Bristol, in the U.K., who trialed the 'Fastball EEG' technology in patients' homes for the first time.

The three-minute "passive test"—which records electrical activity in the brain while participants view a stream of images—can reliably identify memory problems in people with Mild Cognitive Impairment (MCI)—a condition that can lead to Alzheimer's.

"We're missing the first 10 to 20 years of Alzheimer's with current diagnostic tools. Fastball offers a way to change that—detecting memory decline far earlier and more objectively, using a quick and passive

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