Not enough people know about the world of musculoskeletal radiology, but this site can address some of those glaring gaps in medical and physiological knowledge. Created by Doctor Michael Richardson at the University of Washington, this online muscle atlas covers the lower and upper extremity, and is primarily designed for use by health science professionals. The site also includes some teaching and instructional materials related to radiology. Visitors will note that the site contains a table of contents, and all of the major muscles are listed alphabetically, from the Adductor Brevis to the Vastus Medialis. Additionally, for each muscle, visitors can view a high-quality image of the related muscle groups and the function of each muscle in question.