To understand a Biceps Tendon Tear, we must first understand the anatomy of biceps. Biceps are muscles present in the front of the upper arm and stretches from shoulder to elbow. Tendons are tough connective tissues that help the bicep muscles attach to the bones at the shoulder joint and the elbow joint. Each biceps muscle has two heads (hence called biceps) which begin at the shoulder as two separate pieces and becomes a single piece midway down the upper arm. One of the tendons is called the long head, it attaches to the upper arm bone. The other tendon is the short head which attaches the biceps to a bony bump on the shoulder blade called the caracoid process.