posteriorofupperlimb.ppt

Regional anatomy Department of Anatomy ，Medical College Qingdao University Xia Yujun Dissection of the Scapular Region Reflect all of the skin of the scapular region . Dot throw the flaps away, in order that they may be replaced when the dissection is finished. Define the posterior border of the detoid muscle and confirm the origin of this muscle from the spine and acromion process of the scapula. With a scalpel, cut free the origin of the deltoid muscle from the spine and acromion process but leave its attachment to the clavicle intact. Identify and clean the supraspinatus, infraspinatus, teres minor and tteres major, and the long head of the triceps muscles. Expose the boundaries and contents of the quadrilateral and triangular spaces. Identify and clean the axillary nerve and the posterior circumflex humeral artery which emerge into this region having passed through the quadrilateral space from the axilla. Identify the circumflex scapula artery passing through the triangular space. Examine the tends of the supraspinatus, infraspinatus, and teres minor muscles and note that these tends together to the shoulder joint are refered to clinically as the rotator cuff. Reflect the supraspinatus medially and expose the suprascapular nerve and vessels. Identify the suprascapular ligament that bridges over the suprascapular noch. Dissection of the posterior compartment of the arm The posterior compartment of the upper arm contains the triceps muscle and its nerve and blood supply. Passing through the compartment are the radial and ulnar nerves. Make a vertical incision through the deep fascia down the midline of the posterior surface of the arm .Reflect all of the skin.  Dot throw the flaps away, in order that they may be replaced when the dissection is finished. Clean the triceps muscle and identify the lateral, long, and medial heads. Follow the muscle to its insertion on the olecranon process of the ulna. Radial nerve Expose the radia