Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Epilepsy ?
    ### Response:
    The epilepsies are a spectrum of brain disorders ranging from severe, life-threatening and disabling, to ones that are much more benign. In epilepsy, the normal pattern of neuronal activity becomes disturbed, causing strange sensations, emotions, and behavior or sometimes convulsions, muscle spasms, and loss of consciousness.
    