Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Hypokalemic periodic paralysis ?
    ### Response:
    What causes hypokalemic periodic paralysis? Hypokalemic periodic paralysis is caused by mutations in the CACNA1S and SCN4A genes. The CACNA1S and SCN4A genes provide instructions for making proteins that play an essential role in muscles used for movement (skeletal muscles).
    