The new deep prior area provides flexion and you may curve hands making a finger
The fresh deltoid is the biggest abductor of one’s arm and also encourages bending and medial rotation, and additionally extension and lateral rotation. New subscapularis starts toward subscapular fossa and you may medially rotates the latest case. Entitled due to their cities, the supraspinatus (originating from brand new supraspinous fossa) in addition to infraspinatus (from this new infraspinous fossa) abduct new case, and you may laterally switch the arm, correspondingly. The brand new heavy and flat teres big are inferior compared to the teres slight and you will expands the new arm, helping within the adduction and you can medial rotation.