Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Hereditary neuralgic amyotrophy ?
    ### Response:
    Hereditary neuralgic amyotrophy is a type of nervous system disease that affects the brachial plexus. Common signs and symptoms include episodes of severe pain and muscle wasting in one or both shoulders and arms.  Attacks may be spontaneous or triggered (e.
    