Abundance of Dendrite in the Hippocampus (image) Cell Press Share Print E-Mail Caption The abundance of dendrite in the hippocampus of animals that underwent extinction training in combination of HDACis (lower) is significantly higher than in animals s that underwent extinction training alone (upper). Credit Cell, Gräff et al. Usage Restrictions Credit Required Share Print E-Mail 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.