Review of systems should identify neurologic symptoms and other factors that may suggest a specific type of dementia, such as the following: Parkinsonian symptoms in Lewy body dementia Focal neurologic deficits in vascular dementia Head trauma (eg, due to a recent fall) suggesting subdural hematoma Inability to look upward or downward and falling in progressive supranuclear palsy Choreiform movements in Huntington disease Gait disturbance in normal-pressure hydrocephalus Low energy, dry skin, and weight gain in hypothyroidism Balance problems and difficulty with fine motor movements in vitamin B12 deficiency Past medical history should include known disorders and complete prescription and over-the-counter drug use history.