Anterior border is concave forward and posterior border is convex backward. Anatomic variance of the coracoclavicular ligaments orthosports. Textbooks and anatomic studies differ widely in their representations of the course and attachments of the coracoclavicular ligamentsthe conoid and trapezoid. Sep 15, 2015 upper limb bones are the first one to be studied in anatomy classes. In human anatomy, the clavicle or collar bone is classified as a long bone that makes up part of the shoulder girdle pectoral girdle. Tell a friend about us, add a link to this page, or visit the webmasters page for. The lateral third presents the conoid tubercle and trapezoid line. The medial component of the ca ligament is the conoid ligament which inserts onto the conoid tubercle, and the lateral component is the trapezoid ligament which inserts onto the trapezoid line.
Anatomy of the clavicle and coracoid process for reconstruction of the coracoclavicular ligaments article in the american journal of sports medicine 355. At the posterior inferior side of the clavicle, near the point where the prismatic joins with the flattened portion, is a rough eminence, the conoid tubercle or coracoid tuberosity. This book is distributed under the terms of the creative commons. To view other topics, please sign in or purchase a subscription.
Lateral to the conoid ligament is the trapezoid ligament, which runs from the coracoid process of the scapula to the trapezoid line of the clavicle. Tubercle arises from the latin tuber meaning a lump combined with the diminutive ending denoting a small lump. Sep 10, 2011 a bone density projecting from the inferior aspect of the clavicle represents an enlarged conoid tubercle making an accessory articulation with the coracoid process of scapula. The conoid tubercle is found on the lateral end acromial extremity of the clavicle, and is located posteriorly. Absent ho trauma, bilateral and the smooth corticated margin point to a congenital origin of this anomaly and differente it from posttraumatic ossification of the. It marks the insertion of the conoid ligament which along with the trapezoid.
There are five muscles that make their origin or insertion on the clavicle. Running forward and outward from this tubercle on the under surface is a rough line which serves as the point of attachment of the trapezoid ligament. Whether youve loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. Subscapularis inserted on lesser tubercle of humerus. The clavicle is roughly sshaped with a flattened, concave, lateral onethird and a thickened, convex, medial twothirds. There are two clavicles, one on the left and one on the right. Its not, that her novels are extraordinary or incredibly good apart from fangirl that is, but rowell always makes me feel comfortable and cozy.
The coracoclavicular ligament in further detail is created by the conoid ligament, medial from the coracoid process of the scapula and inserts on the conoid tubercle of the clavicle. This is important for anatomical reconstruction of coracoclavicular ligaments. On the inferior surface of lateral third is the conoid tubercle for the attachment of the conoid ligament and lateral to this is the trapezoid line for attachment of the trapezoid ligament. This is due to various muscle attachments on the borders of the scapula and thus, is why the borders of the. The conoid ligament attaches to the clavicle at the conoid tubercle, which is. The lateral third of the clavicle serves as attachments for the deltoid and trapezius muscles anteriorly and posteriorly, respectively. Other readers will always be interested in your opinion of the books youve read. Upper limb thorax is a comprehensive book for undergraduate students of medicine. The clavicle, or collarbone, is a long bone that serves as a strut between the shoulder blade and the sternum breastbone. Conoid tubercle definition of conoid tubercle by medical.
The conoid tubercle also known as the coracoid tuberosity not to be confused. Anatomic variance of the coracoclavicular ligaments. This reference is not to the shape of the tubercle, but the ligament that attaches to the tubercle. Dec 17, 2018 though not as large as other supporting structures in the body, clavicular attachments allow for significant function and range of motion of the upper extremity as well as protection of. The conoid tubercle can be found on the lateral aspect allowing and solidifying the connection between the clavicle and scapula via the conoid ligament. A fracture medial to the conoid tubercle interrupts weight transmission from the arm to the axial skeleton. It receives its name from the latin clavicula little key because the bone rotates along its axis like a key when the shoulder is abducted. Together with the shoulder blade, it makes up the shoulder girdle. Thus, the superior attachment at the clavicle is wide, while the inferior attachment is narrow, wrapping around the posteromedial aspect and root of the coracoid process.
Inferior surface has conoid tubercle and trapezoid ridge. It marks the insertion of the conoid ligament which along with the trapezoid ligament forms part of the coracoclavicular ligament complex. At a corresponding point on the posterior and under surface of the bone is a prominent projection called the conoid tubercle. Sep 27, 2019 the lateral onethird of the shaft gives origin to the deltoid in the anterior border and the posterior border provides the insertion for trapezius. Inferiorly the conoid and trapezoid components of the cc ligament provide stability between the clavicle and the coracoid process of the scapula. The conoid tubercle gives attachment to the coinoid ligament, while the trapezoid line gives attachment. Tubercle definition of tubercle by the free dictionary. Then you can start reading kindle books on your smartphone, tablet, or computer no kindle device required. Choose from 161 different sets of clavical flashcards on quizlet. The worlds newest comprehensive book of human anatomy with. The complex topography of the coracoid process and the irregular shapes of the conoid and trapezoid ligaments often complicate descriptions and 2dimensional drawings. The medial fragment, as a rule, is a little displaced. You must there are over 200,000 words in our free online dictionary, but you are looking for one thats only in the merriamwebster unabridged dictionary. The attachment of the trapezoid ligament is indicated by the trapezoid line that spreads out laterally from the conoid tubercle.
The evolutionary transition from an apelike to humanlike upper extremity occurred in the context of a behavioral shift from an upper limb predominantly involved in locomotion to one adapted for. A novel and millions of other books are available for instant access. Canoid definition is of or relating to the arctoidea. From the conoid tubercle an oblique ridge, the trapezoid line runs forward and lateralward, and affords attachment to the trapezoid ligament on inferior surface of clavicle. One last feature that will be discussed in this section is the intertubercular groove or sulcus. The trapezoid line is an attachment site for a ligament referred to as the trapezoid ligament, which aids in solidifying the articulation between the scapula and the clavicle. The conoid tubercle also known as the coracoid tuberosity not to be confused with the coracoid process of the scapula is a bony prominence on the inferior surface of the lateral third of the clavicle. A small rounded projecting part or outgrowth, such as a wartlike excrescence on the roots of some leguminous plants or a knoblike process in the skin. Anatomy, shoulder and upper limb, coracoclavicular joint. Inferior surface has a ridge called trapezoid line and a tubercle, the conoid tubercle for attachment with trapezoid and conoid part of coracoclavicular ligament that serves to connect the clavicle with the coracoid process of the scapula.
On the inferior surface of the medial clavicle is the costal tuberosity and groove for subclavius for the attachment of costoclavicular ligament and subclavius muscle, respectively. Muscles and ligaments that attach to the clavicle include. Ta the prominence near the lateral end of the inferior surface of the clavicle that gives attachment to the conoid ligament. Anterior and posterior border, superior and inferior surface. The lesser tubercle, in comparison to the greater tubercle, projects medially and anteriorly. The clavicle is the only long bone in the body that lies horizontally. The conoid and trapezoid ligaments are continuous inferiorly at the coracoid process attachment but separate at an angle before attaching to the inferior aspect of the clavicle superiorly. Listers tubercle or dorsal tubercle of radius is a bony prominence located at the distal end of the radius, palpable on the dorsum of the wrist. For more information about the find attachments command, see finding attachments. The clavicular part of the pectoralis major muscle originates from the medial clavicle anteriorly. From superior to inferior, the conoid ligament appears as an inferior pointing cone.
The conoid tubercle and the trapezoid ridge give attachments to the conoid and the trapezoid parts of the coracoclavicular joint. Conoid tubercle of clavicle definition of conoid tubercle. The infraglenoid tubercle marks the origin of the lateral head of the triceps brachii muscle. Memorix anatomy sample 4 pages by radovan hudak issuu.
These muscle attachments, especially the greater tubercle, projects laterally relative to the humerus and posteriorly relative to the lesser tubercle. Find all the books, read about the author, and more. In some people, particularly females who may have less fat in. Conoid, meaning coneshape, comes from the greek konos for cone and eidos meaning shape. It is the attachment point for the conoid ligament, which attaches to the coracoid process of the scapula and reinforces the joint between these two bones. The coracoclavicular ligament may be referred to as a complex because it is composed of two parts, the conoid and trapezoid ligaments. Sitminorsupraspinatus,infraspinatus,teres minor inserted on gretaer tubercle of humerus on posterior side of top of humerus. The conoid tubercle gives the attachment for the conoid ligament and is situated on the posterior inferior surface of the lateral curvature of the clavicle. Chapter 4 structure and function of the shoulder complex chapter outline osteology sternum clavicle scapula proximaltomid humerus arthrology sternoclavicular joint scapulothoracic joint acromioclavicular joint glenohumeral joint interaction among the joints of the shoulder complex muscle and joint interaction innervation of the shoulder. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Study flashcards on upper limb, grays anatomy for students at. Anatomy, shoulder and upper limb, clavicle statpearls.
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