Shoulder Anatomy. The shoulder joint, also known as the glenohumeral joint, is the major joint of the shoulder, but can more broadly include the acromioclavicular joint. Two joints in the shoulder allow it to move: the acromioclavicular joint, where the highest point of the scapula (acromion) meets the clavicle, and the glenohumeral joint. The human shoulder is made up of three bones: the clavicle (collarbone), the scapula (shoulder blade), and the humerus (upper arm bone) as well as associated muscles, ligaments and tendons. © 2005-2020 Healthline Media a Red Ventures Company. The shoulder joint is composed of the socket on your shoulder blade (glenoid) and the “ball” at the top of your arm bone (the humerus). Actions. The coracoid process is a hook-like bony projection from the scapula. Its exterior shape is formed by the calcaneus, also known as…, The elbow is one of the largest joints in the body. Get started! What can you tell us about how these joints work? shoulder joint with bones - shoulder bone stock illustrations. Canale S, Campbell’s Operative Orthopaedics, Mosby Elsevier, 2007. Numerous muscles help stabilize the three joints of the shoulder while giving it motion. The shoulder joint is formed by the articulation of the head of the humerus with theglenoid cavity(or fossa) of the scapula. The scapula is a large, flat triangular bone with three processes called the acromion, spi… Responsible for the movement of our ever-important hands, the shoulder is an extremely important part of the body when it comes to getting done what it is we want to get done. The articulations between the bones of the shoulder make up the shoulder joints. All rights reserved. The glenohumeral joint is the ball-and-socket junction of the top of the arm bone, and the socket of the shoulder blade. Shoulder anatomy is actually four joints wrapped up in one arm. Labeled Diagram Of Long Bone 12 photos of the "Labeled Diagram Of Long Bone" labeled diagram of arm bones, labeled diagram of bones in the body, labeled diagram of hand bones, labeled diagram of the long bone, labeled parts of a long bone, Bone, labeled diagram of arm bones, labeled diagram of bones in … These three main bones of the shoulder are called the humerus, scapula, and clavicle. Find out in this Anatomy of the Shoulder Quiz. Goldman L, Cecil Medicine, Saunders Elsevier, 2008. The acromion is a bony projection off the scapula. The name derives from the Classical Latin word for trowel or small shovel, which it was thought to resemble. The arm bone (humerus), the shoulder blade (scapular), the collar bone (clavicle), and the rib cage (bony thorax) make up the relevant bones. It is also called the index finger or the forefinger. The shoulder joint is formed where the humerus (upper arm bone) fits into the scapula (shoulder blade), like a ball and socket. Add to favorites 1 favs. 9. It forms the front portion of the shoulder girdle and is palpable along its entire length with a gentle S-shaped contour.The clavicle articulates at one end with the sternum (chest bone) and with the acromion of the scapula at the other. Scapula: More commonly known as the shoulder blade, the scapula is a flat triangular bone located in the upper back. It consists of the distal ends of the radius and ulna bones, eight carpal bones, and the proximal ends of…, The ankle is the joint between the foot and leg, composed of three separate bones. Clavicle: This bone is also referred to as the collar bone. To further reinforce the shoulder, the four muscles of the rotator cuff extend from the scapula and surround the head of the humerus to both rotate the arm and prevent dislocation. The shoulder is a very strong and flexible joint; however, it requires considerable support from surrounding muscles and tendons. Along with the thumb and middle finger, it is one of the most often-used digits. Below we will reveal the shoulder joint anatomy. Because shoulders have such range of movement and are used often, they are commonly injured. To keep things simple, we can divide the shoulder into layers. The shoulder complex is composed of many different tissue types, and it is the connective tissue that provides the supportive framework for the shoulder's many functions. You need to get 100% to score the 9 points available. 2 ARTICULATION Articulation is between: • The rounded head of the humerus and • The shallow, pear-shaped glenoid cavity of the scapula. At the shoulder, three major bones meet and create a 90-degree angle: The junctions of these three bones and the sternum (chest bone) form three joints: The collection of muscles and tendons in the shoulder is known as the rotator cuff. One way of picturing this joint is to think of a golf ball on a tee. ANATOMY OF SHOULDER JOINT. They serve as the basic structure and support for the joints and ligaments that make up your shoulders as a whole. It stabilizes the shoulder and holds the head of the humerus in the glenoid, a shallow cavity in the scapula. Other important bones in the shoulder include: The acromion is … Two joints are at the shoulder. The Anatomy of the Shoulder. Nerves are like electrical wires that carry signals from the brain to the muscles to allow for movement of the shoulder. The shoulder joint is formed where the humerus (upper arm bone) fits into the scapula (shoulder blade), like a ball and socket. The bones that form the shoulder joint are the humerus (upper arm bone) and the scapula (shoulder blade). The shoulder is made up of two joints, the acromioclavicular joint and the glenohumeral joint. 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