BACKGROUND: Infraspinatus muscle atrophy has been observed in athletes who stress their upper extremities in an overhead fashion. The majority of such case reports have been in volleyball players ...

It provides motor innervation from cervical levels C5 and C6 to the supraspinatus and infraspinatus muscles of the rotator cuff (C4 also contributes in 22% of people),1 as well as proprioceptive ...

or burning pain in the back or side of the shoulder Weakness when bringing the arm into external rotation or out to the side Visible decline (atrophy) of the infraspinatus muscle compared to the ...