Sharing the road (image) Salk Institute Caption Constant crosstalk between motor (shown in green) and sensory (shown in red) nerves ensures that the two different types of neurons join up after they emerge from the spinal cord but sort into separate fascicles containing either sensory or motor axons, but never both. Credit Images: Courtesy of Benjamin W. Gallarda and Shane E. Andrews, Salk Institute for Biological Studies Usage Restrictions News media reproduction to illustrate this story permitted with proper attribution as provided above. For one time use only. 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.