Neuron (IMAGE) Salk Institute Caption The microscope image shows nerve cells in the mouse brain that have been labeled with a modified rabies virus. These cells send direct connections to striatum, a region of the brain that regulates voluntary movement. The striatum is disrupted in degenerative disorders such as Parkinson's disease and Huntington's disease. Credit Courtesy of Nicholas Wall, 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. 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.