Shoulder Anatomy Posterior
Acute posterior shoulder dislocations are less common than anterior dislocations but more commonly missed 50 of traumatic posterior dislocations seen in the emergency department are undiagnosed. The acromion is a bony projection off the scapula.
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Rotates the scapula raises the arm.
Shoulder anatomy posterior. The shoulder joint is formed where the humerus upper arm bone fits into the scapula shoulder blade like a ball and socket. Nerves and blood vessels supply the muscles and bones of the shoulder. Nerves carry signals from the brain to the muscles to move the shoulder and carries signals from the muscles back to the brain about pain pressure and temperature.
The shoulder complex is composed of many different tissue types and it is the connective tissue that provides the supportive framework for the shoulders many functions. Epidemiology incidence 2 to 5 of all unstable shoulders. The clavicle collarbone meets the acromion in the acromioclavicular joint.
Trapezius rotates the scapula raises the arm. The different types of connective tissues in the shoulder are bone articular cartilage ligaments joint capsules and bursa see gross anatomy. Posterior shoulder the following video will walk you through the six steps to dissecting the posterior shoulder.
The latissimus dorsi and teres major on the posterior side extend and adduct the arm towards the vertebrae of the back. On the anterior side of the shoulder the coracobrachialis serratus anterior pectoralis major and pectoralis minor muscles work as a group to flex and adduct the scapula and humerus anteriorly toward the sternum. There is a dissection assistance pdf file that you can use to assist you in your lab preparation.
Pulls raises and adducts the scapula. Pulls rhomboideus major raises and adducts the scapula. The shoulder is the group of structures in the region of the joint.
The shoulder joint ligaments shown are the acromioclavicular ligament coracoclavicular ligament the superior transverse scapular ligament and the joint capsule or glenohumeral ligaments. Adducts and rotates the arm medially. Other important bones in the shoulder include.
Boney structures shown are the acromion of the scapula the clavicle and the humerus. Posterior shoulder instability dislocation. In human anatomy the shoulder joint comprises the part of the body where the humerus attaches to the scapula the head sitting in the glenoid cavity.
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