Let’s first understand what PASTA stands for. PASTA - partial articular supraspinatus tendon avulsion. If we take a look at each part individually, it gives us a better picture as to what the lesion is.
Partial: means the tear has not gone all the way through the tendon.
Articular: There are two surfaces to the tendon. One is bursal and the other is articular. The articular surface is the inner-side of the tendon.
Supraspinatus Tendon: This is one of the tendons which make up the rotator cuff, the group of muscles and tendons which help to move and stabilize the arm at the shoulder.