Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Late-Onset Familial Alzheimer Disease ?
    ### Response:
    Late-onset familial Alzheimer disease is a form of familial Alzheimer disease that begins after age 65. In general, Alzheimer disease (AD) is a degenerative disease of the brain that causes gradual loss of memory, judgement and the ability to function socially.
    