Dementia is estimated to affect a huge 152 million people by 2050, according to a Alzheimer's Society study into the condition.
There are many different types of the dementia with the most common being Alzheimer's disease and vascular dementia. With a variety of form, the condition can also bring a large number of symptoms, reports The Express.
The most common symptoms of dementia include memory loss and confusion. However, there may be an early warning sign - and it is called apathy.
Detecting the condition early can help medics control the progression of the illness and in turn can help slow down sufferer's decline in brain function.
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