Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) familial encephalopathy with neuroserpin inclusion bodies ?
    ### Response:
    Familial encephalopathy with neuroserpin inclusion bodies (FENIB) is a disorder that causes progressive dysfunction of the brain (encephalopathy). It is characterized by a loss of intellectual functioning (dementia) and seizures. At first, affected individuals may have difficulty sustaining attention and concentrating.
    