Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Ataxia ?
    ### Response:
    Ataxia often occurs when parts of the nervous system that control movement are damaged. People with ataxia experience a failure of muscle control in their arms and legs, resulting in a lack of balance and coordination or a disturbance of gait. While the term ataxia is primarily used to describe this set of symptoms, it is sometimes also used to refer to a family of disorders.
    