Maintaining Healthy Dendritic Spines (IMAGE) University of Alabama at Birmingham Caption Inhibiting an enzyme called LIMK1 seems to improve the length and density of dendritic spines, shown here in green. Healthy dendritic spines are thought to have a protective effect against Alzheimer's disease. Credit UAB Usage Restrictions None 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.