Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Neuroferritinopathy ?
    ### Response:
    Neuroferritinopathy is a movement disorder caused by the gradual accumulation of iron in the basal ganglia of the brain. People with neuroferritinopathy have progressive problems with movement that begin at about age 40. These movement problems can include involuntary jerking motions (chorea), rhythmic shaking (tremor), difficulty coordinating movements (ataxia), or uncontrolled tensing of muscles (dystonia).
    