Musculus Sartorius is a long, thin muscle that runs from the hip to the knee along the front of the thigh. It is primarily responsible for hip and knee flexion, as well as external rotation of the thigh. Synonyms for the Musculus Sartorius include the Tailor's muscle, the longest muscle, or the Femoral Anterior muscle. Other possible synonyms for the Musculus Sartorius are the Musculus Longus, the Gartland muscle, or the Roser-Nelaton line. In general, the various synonyms for the Musculus Sartorius refer to its unique shape, length, and function. This muscle is important for maintaining proper posture and movement in the lower body.