Axon branches (IMAGE) University of California - San Diego Caption Shown here in red are branches, or axons, from cells in the substantia nigra brain region that connect to the superior colliculus region. Credit Lauren McElvain / Kleinfeld lab / UC San Diego) Usage Restrictions Must be used in conjunction with Neuron paper on brain connectivity. License Licensed 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.