Figure 1 (IMAGE) Tohoku University Caption Stimulating the vagus nerve connected to the pancreas in mice by blue light increases blood insulin and β-cell numbers. The picture represents a clusters of beta cells (green) in islets of Langerhans in the pancreas. The nuclei of increasing β-cells are shown in pink with white arrowheads. Credit Junta Imai et al. Usage Restrictions Reporters may use freely these materials in news coverage with appropriate credit information. License Original 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.