Certain types of hydrocephalus, a buildup of fluid in the brain
Types of Dementia
Dementia can be split into two groups based on which part of the brain is affected.
Cortical dementias happen because of problems in the cerebral cortex, the outer layer of the brain. They play a critical role in memory and language. People with these types of dementia usually have severe memory loss and can't remember words or understand language. Alzheimer's and Creutzfeldt-Jakob disease are two forms of cortical dementia.
Subcortical dementias happen because of problems in the parts of the brain beneath the cortex. People with subcortical dementias tend to show changes in their speed of thinking and ability to start activities. Usually, people with subcortical dementia don't have forgetfulness and language problems. Parkinson's disease, Huntington's disease, and HIV can cause these types of dementia.
Some types of dementia affect both parts of the brain.
Are There Treatments for Dementia?
To treat dementia, doctors will treat whatever is causing it. About 20% of the causes of dementia are reversible.