Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Alternating Hemiplegia ?
    ### Response:
    Alternating hemiplegia is a rare neurological disorder that develops in childhood, most often before the child is 18 months old. The disorder is characterized by recurrent episodes of paralysis that involve one or both sides of the body, multiple limbs, or a single limb.
    