Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Neuropathy ataxia retinitis pigmentosa syndrome ?
    ### Response:
    Neuropathy ataxia retinitis pigmentosa (NARP) syndrome is characterized by a variety of signs and symptoms that mainly affect the nervous system. Beginning in childhood or early adulthood, most people with NARP experience numbness, tingling, or pain in the arms and legs (sensory neuropathy); muscle weakness; and problems with balance and coordination (ataxia).
    