Repairing a 'Bad' Reputation? (IMAGE) Salk Institute Caption In the top image the neuronal wiring (red) of the heart in Alzheimer's mice appears normal. The bottom image shows the sympathetic innervation in p75-deficient Alzheimer's mice is severely impaired. Credit Credit: Lee Laboratory, 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.