Fiber Microendoscope (image) The Optical Society Share Print E-Mail Caption A new endoscope as small as a human hair was used to image neuronal activity in mice. The optical fiber microendoscope (upper left) is shown just before it is inserted into tissue. Credit Shay Ohayon, Massachusetts Institute of Technology Usage Restrictions None 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.