A patient is admitted to the mental health unit with a diagnosis of vascular dementia. Which of the following describes the brain alteration involved in this disorder?

Vascular dementia is characterized by a progressive worsening of cognitive function due to vascular disease within the brain. Decreased blood flow and tissue hypoxia is often secondary to cerebrovascular disease. Patients diagnosed with vascular dementia will have additional physical health problems that are associated with the dementia. Vascular dementia does not involve the accumulation of abnormal proteins within the brain.