what is the scapulothoracic joint
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- 1 The Scapulothoracic (ST) “joint” is not a true anatomic joint as it has none of the usual joint characteristics (union by fibrous, cartilaginous, or synovial tissues). Any movement of the scapula on the thorax must result in movement at either the AC joint, the SC joint, or both; that is, the functional ST joint is part of a true closed chain with the AC and SC joints and the thorax.
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Acromion The acromion is a continuation of the scapular spine, and hooks over anteriorly.It articulates with the clavicle (collar bone) to form the acromioclavicular joint.he acromion has four ossification centers called (from tip to base) pre-acromion, meso-acromion, meta-acromion, and basi-acromion. In most cases, the first three fuse at 15–18 years, whereas the base part fuses to the scapular spine at 12 years.
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Anatomy of the Shoulder The joint cavity is cushioned by articular cartilage covering the head of the humerus and face of the glenoid. The scapula extends up and around the shoulder joint at the rear to form a roof, called the acromion, and around the shoulder joint at the front to form the coracoid process.
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- click hereYou have 3 open access pages. The sternoclavicular joint is the only bony articulation between the pectoral girdle and axial skeleton on each side. It is a saddle type, synovial joint between the clavicle, the manubrium sternum and the first costal cartilage.It can be readily palpated beneath the skin directly lateral to the suprasternal notch.lick hereYou have 3 open access pages. The sternoclavicular joint is the only bony articulation between the pectoral girdle and axial skeleton on each side. It is a saddle type, synovial joint between the clavicle, the manubrium sternum and the first costal cartilage.
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Glenoid cavity The lateral angle of the scapula or glenoid angle also known as the head of the scapula is the thickest part of the scapula. It is broad and bears the glenoid cavity on its articular surface which is directed forward, laterally and slightly upwards, and articulates with the head of the humerus.
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Bones & Joints of the Shoulder The shoulder joint itself known as the Glenohumeral joint, (is a ball and socket articulation between the head of the humerus and the glenoid cavity of the scapula) The acromioclavicular (AC) joint (where the clavicle meets the acromion of the scapula)
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Shoulder Joint 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 acromioclavicular joint is formed by an articulation between the lateral end of the clavicle and the acromion process of the scapula.
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The Scapula Spine – The most prominent feature of the posterior scapula. It runs transversely across the scapula, dividing the surface into two. Infraspinous fossa – The area below the spine of the scapula, it displays a convex shape. The infraspinatus muscle originates from this area. Supraspinous fossa – The area above the spine of the scapula, it is much smaller that the infraspinous fossa, and is more convex in shape. The supraspinatus muscle originates from this area. Acromion – projection of the spine that arches over the glenohumeral joint and articulates with the clavicle.
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- Specifications (Metric units) Note: The flow values are calculated for joined double valve construction, please reference 8214(200) and V710(B) catalog pages for discrete. valve flows, and optional features. Note: The flow values are calculated for joined double valve construction, please reference 8214(200) and V710(B) catalog pages for discrete.
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Description The Sternoclavicular Joint (SC joint) is formed from the articulation of the medial aspect of the clavicle and the manubrium of the sternum. It is one of four joints that compose the Shoulder Complex. The SC joint is generally classified as a plane style synovial joint, and has a fibrocartilage joint disk.
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Description 1 4 References. 2  The Scapulothoracic (ST) “joint” is not a true anatomic joint as it has none of the usual joint characteristics (union by fibrous, cartilaginous, or synovial tissues). Any movement of the scapula on the thorax must result in movement at either the AC joint, the SC joint, or both; that is, the functional ST joint is part of a true closed chain with the AC and SC joints and the thorax.
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Levator scapulae muscle Levator scapulae muscle. Anatomy and supply. The levator scapulae is a long muscle of the shoulder girdle. It originates at the transverse processes of the atlas and axis as well as the posterior tubercles of the 3rd-4th cervical vertebrae. It inserts at the superior angle and medial border of the scapula.
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- Acromioclavicular dislocation was the most commonly associated injury and was evident in 39 of their patients. Ipsilateral nonunions of the coracoid process and distal clavicle: a rare shoulder girdle fracture pattern. The point of maximal tenderness was over the acromioclavicular joint. Pitfalls in the diagnosis of infection around the shoulder joint: report of three cases. Laterally, the clavicle attaches to the scapula via the coracoclavicular ligaments and acromioclavicular ligaments.
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- Sports Medicine Program ». Acromioclavicular (AC) Joint Separation. An acromioclavicular (AC) joint separation is the formal name for a separation of the collar bone from the shoulder blade. The collar bone (clavicle) and the shoulder blade (scapula) together form the socket that holds the ball of the upper arm bone. An AC joint separation is most typically caused by falling or being hit on the point of the shoulder blade or an outstretched arm.
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- The Acromioclavicular Joint, or AC Joint, is one of four joints that compose the Shoulder Complex. The AC Joint is formed by the junction of the lateral clavicle and the acromion process of the scapula, and is a gliding, or plane style synovial joint.
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Shoulder girdle The shoulder girdle or pectoral girdle is the set of bones which connects the upper limb to the axial skeleton on each side.In humans it consists of the clavicle and scapula; in those species with three bones in the shoulder, it consists of the clavicle, scapula, and coracoid.he shoulder girdle consists of five muscles that attach to the clavicle and scapula and allow for the motion of the sternoclavicular joint (connection between sternum and clavicle) and acromioclavicular joint (connection between clavicle and scapula).
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- Shoulder Joint Diagram Shoulder Joint The most flexible joint in the entire human body, our shoulder joint is formed by the union of the humerus, the scapula (or shoulder blade), and the clavicle (or collarbone). Commonly thought of as a single joint, the shoulder is actually made up of two separate joints - the glenohumeral and acromioclavicular joints.
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Tendinous arch In anatomy, the scapula is the bone that connects the humerus with the clavicle. Like their connected bones the scapulae are paired, with the scapula on either side of the body being roughly a mirror image of the other. In early Roman times, people thought the bone resembled a trowel, a small shovel. The shoulder blade is also called omo in Latin medical terminology. The scapula forms the back of the shoulder girdle. In humans, it is a flat bone, roughly triangular in shape, placed on a posterol
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- AC Joint Arthritis. AC Joint Arthritis. The acromioclavicular joint, or AC joint, is the joint formed between the collarbone (clavicle) and the top of the shoulder blade (acromion). Most people have a visible AC joint “bump” on the top of their shoulder where these two bones meet.
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Bones of the Arm and Hand Posterior to the clavicle is the scapula, a flat, triangular bone located lateral to the thoracic spine in the dorsal region of the body. The scapula forms two joints – the acromioclavicular (AC) joint with the clavicle and the shoulder (humeroscapular) joint with the humerus.
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Bones & Joints of the Shoulder There are four joints making up the 'shoulder joint': 1  The shoulder joint itself known as the Glenohumeral joint, (is a ball and socket articulation between the head of the humerus and the glenoid cavity of the scapula).2  The acromioclavicular (AC) joint (where the clavicle meets the acromion of the scapula).here are four joints making up the 'shoulder joint': 1  The shoulder joint itself known as the Glenohumeral joint, (is a ball and socket articulation between the head of the humerus and the glenoid cavity of the scapula).
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Shoulder The shoulder joint (also known as the glenohumeral joint) is the main joint of the shoulder. It is a ball and socket joint that allows the arm to rotate in a circular fashion or to hinge out and up away from the body.he shoulder joint also known as the glenohumeral joint, is the major joint of the shoulder, but can more broadly include the acromioclavicular joint. 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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Joints and Ligaments - Horse Anatomy The shoulder joint is the articulation between the glenoid cavity of the scapula and the head of the humerus. In the horse, lateral and medial movements of this joint are impossible due to the shape of the humeral head; movement is therefore limited to flexion and extension. The joint is strengthened by the medial and lateral glenohumeral ligaments.
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Scapula The scapula is an important bone as each scapula provides a point of attachment for a number of muscles that make up the arm and shoulder. It also articulates with the humerus and clavicle, forming the glenohumeral (shoulder) joint and acromioclavicular joint respectively.
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Scapholunate injuries: A paradigm shift? The scapholunate is an interosseous carpal ligament that provides stability to the proximal carpal row. It consists of dorsal, proximal and palmar segments that bridge the scaphoid and lunate.
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Acromion Acromion Scapula. Scapula is the scientific name for the shoulder blade. It is a kind of triangular, flat bone lying over the back of the upper ribs. The scapula serves as an attachment for the muscles of the arm, neck, chest and the back. The back of the scapula is divided into unequal portions by a spine.