Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Giant Axonal Neuropathy ?
    ### Response:
    Giant axonal neuropathy (GAN) is a rare inherited genetic disorder that affects both the central and peripheral nervous systems. The majority of children with GAN will begin to show symptoms of the disease sometime before five years of age. Signs of GAN usually begin in the peripheral nervous system, which controls movement and sensation in the arms, legs, and other parts of the body.
    