Nerve Fiber Illumination (image) California Institute of Technology Caption Left: This is an image of fluorescent nerve fibers in the spinal cord, viewed through the microscope prior to stimulation. Right: This is a magnified view showing the increase in fluorescence signal in one specific fiber (boxed area, red color) during stroking with the brush. Credit Anderson Lab/Caltech Usage Restrictions Okay with credit. 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.