In Vivo Neural Imaging (video) University of California - San Diego Share Print E-Mail Loading video... Caption This is imaging of calcium spikes 250 micrometers below the cortical surface in transgenic mice. Studies were performed with low-impedance transparent graphene electrodes developed by researchers at UC San Diego. Credit Yichen Lu Usage Restrictions Please credit: Yichen Lu 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.