Shoulder Anatomy Posterior

Boney structures shown are the acromion of the scapula the clavicle and the humerus. Pulls raises and adducts the scapula.

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Nerves and blood vessels supply the muscles and bones of the shoulder.

Shoulder anatomy posterior. The shoulder is the group of structures in the region of the joint. 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. Rotates the scapula raises the arm.

Trapezius rotates the scapula raises the arm. Other important bones in the shoulder include. Pulls rhomboideus major raises and adducts the scapula.

The shoulder joint is formed where the humerus upper arm bone fits into the scapula shoulder blade like a ball and socket. 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 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.

The acromion is a bony projection off the scapula. The clavicle collarbone meets the acromion in the acromioclavicular joint. There is a dissection assistance pdf file that you can use to assist you in your lab preparation.

Epidemiology incidence 2 to 5 of all unstable shoulders. Adducts and rotates the arm medially. The latissimus dorsi and teres major on the posterior side extend and adduct the arm towards the vertebrae of the back.

Posterior shoulder instability dislocation. Posterior shoulder the following video will walk you through the six steps to dissecting the posterior shoulder. 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.

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 different types of connective tissues in the shoulder are bone articular cartilage ligaments joint capsules and bursa see gross anatomy. The shoulder joint ligaments shown are the acromioclavicular ligament coracoclavicular ligament the superior transverse scapular ligament and the joint capsule or glenohumeral ligaments.

Triceps Brachii Muscle Medial Head