This is a picture photographed Dr. Kieran Boyle of University of Glasgow in Glasgow, United Kingdom. He used 63 x magnification. It is a hippocampal neuron receiving excitatory contacts and his technique was Fluorescence and Confocal. I believe it is some sort of important nerve. I’m not very sure what part of the body, but I figured out that it is one major nerve in the brain and falls under the study of neuroscience.
Fluorescence is the is the emission of light by a substance that has absorbed light or other electromagnetic radiation, it also occurs when molecules are excited to higher electric states by energetic states by energetic electron bombardment.