'Wires' in the developing brain (IMAGE) University of Cambridge Caption Holt's work revealed how the brain develops. Here, axons - the 'wires' - from different parts of the eye (red versus green) connect with precise areas of the midbrain. Credit University of Cambridge Usage Restrictions with credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.