Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) infantile neuronal ceroid lipofuscinosis ?
    ### Response:
    Infantile neuronal ceroid lipofuscinosis (NCL) is an inherited disorder that primarily affects the nervous system. Beginning in infancy, children with this condition have intellectual and motor disability, rarely developing the ability to speak or walk. Affected children often have muscle twitches (myoclonus), recurrent seizures (epilepsy), or vision impairment.
    