Gray code. The reflected binary code (RBC), also known as Gray code after Frank Gray, is a binary numeral system where two successive values differ in only one bit (binary digit). The reflected binary code was originally designed to prevent spurious output from electromechanical switches.
Neural tube defects happen when the neural tube does not close as expected. Anencephaly occurs when the end of the neural tube that would have developed into the brain does not close properly, resulting in the failure of the development of major portions of brain, skull and scalp.
Porencephaly: A disorder of the central nervous system involving a cyst or cavity in a cerebral hemisphere of the brain.The cysts or cavities are usually the remnants of destructive lesions, but are sometimes the result of abnormal development.orencephaly has a number of different causes including absence of brain development and destruction of brain tissue. The presence of porencephalic cysts can sometimes be detected by transillumination of the skull in infancy (when a strong light is shined through the head).