Fiber components of the shoulder superior labrum.

The superior labrum is not homogenous. The posterior portion mainly consists of the robust fiber component of the long head of the biceps tendon. The anterosuperior portion includes fibers of the sheet-like structure which contains numerous elastic fibers. Tensile stress from the rotator interval might be conveyed to the anterosuperior labrum. Arai R, Kobayashi M, Toda Y, Nakamura S, Miura T, Nakamura T. Surg Radiol Anat. 2011 Jun 19. [Epub ahead of print] PMID:  21688137