Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Colpocephaly ?
    ### Response:
    Colpocephaly is a congenital brain abnormality in which the occipital horns - the posterior or rear portion of the lateral ventricles (cavities) of the brain -- are larger than normal because white matter in the posterior cerebrum has failed to develop or thicken.
    