Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Bilateral perisylvian polymicrogyria ?
    ### Response:
    Bilateral perisylvian polymicrogyria (BPP) is a rare neurological disorder that affects the cerebral cortex (the outer surface of the brain). Signs and symptoms include partial paralysis of muscles on both sides of the face, tongue, jaws, and throat; difficulties in speaking, chewing, and swallowing; and/or seizures.
    