Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Infantile Spasms ?
    ### Response:
    An infantile spasm (IS) is a specific type of seizure seen in an epilepsy syndrome of infancy and childhood known as West Syndrome. West Syndrome is characterized by infantile spasms, developmental regression, and a specific pattern on electroencephalography (EEG) testing called hypsarrhythmia (chaotic brain waves).
    