Scientists with the Center for Behavioral Neuroscience, a research consortium based at Georgia State University, have for the first time used a form of magnetic resonance imaging to reveal anatomical features of the nervous system in a live crayfish, a crustacean whose brain measures only 3 millimeters wide.
http://www.sciencedaily.com/releases/2004/12/041219181540.htm
Researchers Develop MRI Technique To Study Brain Anatomy In Invertebrates
