Another person develops Alzheimer's diseaseevery 3 seconds, according to Alzheimer's Disease International. The number of people living with this most common form of dementiacurrently stands at around 50 million. By 2050, experts expect this figure to have tripled.

The last "significant breakthrough" in Alzheimer's research happened 4 decades ago, states the latest World Alzheimer's Report. However, a recently developed smartphone game may alter that statistic.

"Research shows us that the brain changes associated with diseases like Alzheimer's begin decades before symptoms like memory loss start," says Hilary Evans, chief executive at Alzheimer's Research United Kingdom.

"[F]or future Alzheimer's treatments to be effective, it's likely they must be given at the earliest stages of disease, before there's too much damage to the brain."

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