Musculus infraspinatus
The Musculus infraspinatus originates in the Fossa infraspinata of the shoulder blade. This is located on the outside of the bony shoulder blade. It starts at the large hump (tuberculum majus) of the humerus. Due to this course, its main task is external rotation. In addition, it lifts the entire upper extremity outwards when the … Musculus infraspinatus