The superior rectus is a muscle in the human eye that is responsible for eye movement. It is part of a group of six muscles that control the movement of the eye. Synonyms for the superior rectus include the Latin term "Musculus Rectus Superior," which simply means the "upper straight muscle". Other synonyms may include the "levator muscle" or the "levator palpebrae muscle," which are both muscles that also control the movement of the eye and the eyelids. The superior rectus is an essential muscle for eye movement and helps us to look up and down effortlessly. Understanding the synonyms for this muscle can aid in better communication about eye movement and visual function.