Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Tourette syndrome ?
    ### Response:
    What causes Tourette syndrome? Although the cause of Tourette syndrome is unknown, current research points to abnormalities in certain brain regions (including the basal ganglia, frontal lobes, and cortex), the circuits that interconnect these regions, and the neurotransmitters (dopamine, serotonin, and norepinephrine) responsible for communication among nerve cells.
    