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A representative left elbow dissection showing both the short and long muscle bellies and the 90° external rotation of the distal biceps tendon as it crosses the joint and inserts onto the radial tuberosity. The most medial border of the short head becomes the most distal insertion point on the radial tuberosity. BR, brachialis; DBT, distal biceps tendon; LH, long head; RT, radial tuberosity; SH, short head.
