https://youtu.be/jo_6SkaWMIYClueless About Rotator Cuff Anatomy? Here’s the Basics! Summary of Rotator Cuff Anatomy 1. Overview The rotator cuff is a group of four muscles (supraspinatus, infraspinatus, teres minor, subscapularis) and their tendons, crucial for stabilizing the glenohumeral joint. 2. Posterosuperior CuffSupraspinatus: Key for shoulder abduction; most frequently injured tendon.Inf..