Dr. SREEKANTH THOTA. DEPARTMENT OF ANATOMY. UPPER LIMB. WINDSOR UNIVERSITY SCHOOL OF MEDICINE St.Kitts. SHOULDER . SHOULDER . The shoulder is the region of upper limb attachment to the trunk and neck. . Bones of the Shoulder Girdle .
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DEPARTMENT OF ANATOMY
Due to loss of Innervation-long thoracic nerve
Extends, adducts, and medially rotates the arm
Anterior part: flexes and medially rotates armMiddle part: abducts armPosterior part: extends and laterally rotates arm
The deltoid is a common site for the intramuscular injection of drugs.
The axillary nerve runs transversely under cover of the deltoid at the level of the surgical neck of the humerus.
The deltoid atrophies when the axillary nerve (C5 and C6) is severely damaged.