poikkihartialihaksia
Poikkihartialihaksia, also known as the supraspinatus and infraspinatus muscles, are key components of the rotator cuff in the shoulder. The supraspinatus originates from the supraspinous fossa of the scapula and inserts onto the greater tubercle of the humerus. Its primary action is the initiation of arm abduction, meaning it helps lift the arm away from the body.
The infraspinatus originates from the infraspinous fossa of the scapula and also inserts onto the greater
Dysfunction or injury to the poikkihartialihaksia, particularly the supraspinatus, is a common cause of shoulder pain