RESUMO
None of the small muscles of the superior radio-ulnar joint was described or illustrated in contemporary anatomical textbooks. Thus the aim of the present work was to throw more light on the anatomy of these muscles in Egyptians. A gross anatomical study of the elbow region was made on twenty separate human upper limbs of Egyptian cadavers collected from the dissecting room of Tanta Faculty of Medicine. The results of the present study revealed three very small muscles. The lateral tensor muscle of the annular ligament was found in twelve per twenty limbs, deep to the supinator muscle. It took origin from the proximal part of the supinator crest and inserted in the anterolateral aspect of the annular ligament. The medial tensor muscle of the annular ligament was found in six per twenty limbs. Its origin was from the anteromedial part of the annular ligament and its insertion was just above the radial tuberosity. It joined the biceps tendon by small aponeurotic fibres. The accessory supinator muscle was found in six per twenty limbs deep to the supinator and brachialis. It was present always with the lateral tensor muscle. Its origin was from the coronoid process of the ulna lateral to the ulnar tuberosity. It inserted in the radial tuberosity posterior to the biceps tendon. These muscles would be synergistic to the primary supinator muscle of the superior radio-ulnar joint