Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Schizencephaly ?
    ### Response:
    Schizencephaly is an extremely rare developmental birth defect characterized by abnormal slits, or clefts, in the cerebral hemispheres of the brain. Babies with clefts in both hemispheres (called bilateral clefts) commonly have developmental delays, delays in speech and language skills, and problems with brain-spinal cord communication.
    