Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to episodic ataxia ?
    ### Response:
    Episodic ataxia can be caused by mutations in several genes that play important roles in the nervous system. Three of these genes, KCNA1, CACNA1A, and CACNB4, provide instructions for making proteins that are involved in the transport of charged atoms (ions) across cell membranes.
    