Professor Donna Wilcock explains that Alzheimer's disease is diagnosed clinically by a battery of tests that can take a full day to administer.

Alzheimer’s disease is diagnosed clinically, right now, by a battery of memory tests that are administered typically by a neurologist who is running a memory clinic. These memory tests can take a full day, basically, of different types of memory and recall – maybe telling you a story when you first walk into the clinic and then asking you to recall it a couple hours later. All of these tests test very slightly different mechanisms of memory in different parts of the brain. Based on these, there are some patterns you see that really indicate that yes this really is Alzheimer’s [disease], or no it is different, as there are many other different types of dementia.

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