Dementia is type of brain disease caused due to the damage of brain nerve cells. The symptoms are decline in thinking ability, communication problems and memory loss. Simple walking test helps in accurate diagnosis of dementia, which is often not diagnosed due to its similar symptoms with other disorders, finds a study published in the journal Neurology. This test is performed based on how fast the person walks, walking backwards and walking with a tray. It also helps to differentiate whether the person has idiopathic normal pressure hydrocephalus or progressive supranuclear palsy.