Anatomy and Biomechanics of Lower Extremity Tendons: Imaging Implications

A comprehensive understanding of the anatomy and biomechanics of muscle fibers and tendons is crucial to comprehend their functions. The orientation of tendon fibers plays a significant role in the pathologies that affect them and the resulting functional impairments. In this review, we provide detailed information on the origin, insertion, and fiber orientation of selected muscles and tendons, as well as their functional significance. To aid in comprehension, we have included illustrations depicting the anatomy and fiber orientation, as well as cross-sectional MR images that highlight important imaging features of normal anatomy and tears of select lower extremity tendons.