Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Dementia ?
    ### Response:
    Dementia is the name for a group of symptoms caused by disorders that affect the brain. It is not a specific disease. People with dementia may not be able to think well enough to do normal activities, such as getting dressed or eating. They may lose their ability to solve problems or control their emotions.
    