The coracoclavicular ligament may be referred to as a complex because it is composed of two parts, the conoid and trapezoid ligaments. Anatomy, shoulder and upper limb, clavicle statpearls. 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. The conoid tubercle, which is found more laterally towards the acromial end. Four anterior pectoral muscles move the pectoral girdle and arm from the front. The sphericalshaped head is at the proximal end of the humerus, which joins the shoulder girdle. It articulates medially with the manubrium sterni, and laterally with the acromion of the scapula. 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. 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. The book comprises of chapters on bones of upper limb, pectoral region, scapular region, forearm and hand, joints of upper limb, wall of thorax, thoracic cavity and the pleura, pericardium, and the heart. 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. All three of the muscles that attach to the greater tubercle are part of the rotator cuff, a muscle group that stabilizes the shoulder joint. The conoid ligament is a part of the coracoclavicular ligament, which attaches the clavicle to the coracoid process of the scapula. Study 261 anat 1 study guide 2012 bookstein flashcards from studyblue on studyblue.
The conoid tubercle lies on the inferior surface close to the posterior border at the junction of the lateral one fourth and medial threefourth of the clavicle. 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. The great strength of the sc joint is a consequence of these attachments. Aug 08, 2018 the conoid tubercle is located near the posterior border on the junction of the lateral onefourth along with medial threefourth of the clavicle on the inferior surface. The acromial end articulates with the acromion process of the scapula. Conoid tubercle found on the lateral end of the clavicle. Coracoclavicular ligament radiology reference article. Articulates medially with the manubrium sterni and laterally with the. At the lateral end of the bone is the conoid tubercle, on the posterior portion of the lateral curve of the clavicle and the trapezoid line, which lies in an anteroposterior direction just lateral to the conoid tubercle. The coracoid process provides attachment for the coracoclavicular ligament as well as the short head of the biceps. 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. It appears as a rough eminence found where the flat portion of the clavicle meets. These bones have some interesting landmarks, including various bumps and projections.
Collins, md in those cases where the acromion has been torn off, the bone which is thus separated appears prominent. Conoid tubercle article about conoid tubercle by the free. Coracoid process, spine, glenoid cavity, subscapular fossa, medial margin, lateral margin, superior angle, inferior angle, supraspinous fossa, infraspinous fossa, supraglenoid tubercle, infraglenoid tubercle. Conoid tubercle found on the lateral end of the clavicle and is located from ant 312 at grand valley state university. The conoid ligament is the posterior and medial fasciculus of the coracoclavicular ligament. The conoid ligament and its partner coracoclavicular ligament, the trapezoid ligament, passively suspend the free upper limb from the strut formed by the clavicle. The fourth muscle of the rotator cuff the subscapularis does not attach to the greater tubercle, but instead attaches to the lesser tubercle. Jenny it wasnt a minor subplot the whole idea of the newspaper providing internet access to their employees later than their peers, etc was part of themore it wasnt a minor subplot the whole idea of the newspaper providing internet access to their employees later than their peers, etc was part of the paranoia and fear of the unknown that defines those years. Conoid tubercle definition of conoid tubercle by medical. 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. As the only dude to win this book from goodreads firstreads i feel a bit o pressure. Disorders of the acromioclavicular joint musculoskeletal key.
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. Tubercle arises from the latin tuber meaning a lump combined with the diminutive ending denoting a small lump. Upper limb thorax is a comprehensive book for undergraduate students of medicine. The coracoid process of the scapula projects upward and forward above the glenoid fossa fig. The bony structures of the shoulder include the pectoral girdle and one arm bone. Conoid tubercle definition of conoid tubercle by the. The shoulder girdle has muscular attachments to the cervical spine in the form of the axioscapular muscles and carries the trunks of the brachial plexus to the upper limb after their exit from the intervertebral foramen. Other readers will always be interested in your opinion of the books youve read. It gives attachment to the conoid ligament, which attaches the clavicle to the coracoid process of the scapula, nearly vertically. The conoid tubercle is a normal anatomical variant. Collarbone superior to 1st rib and runs horizontally from the manubrium of the sternum to the acromion of the scapula also forms shoulder or pectoral girdle, which connects the humerus to the axial skeleton.
The clavicle is the only long bone in the body that lies horizontally. The costal tuberosity, located at the sternal end of the bone. There are two clavicles, one on the left and one on the right. The conoid tubercle also known as the coracoid tuberosity not to be confused. Anatomy, shoulder and upper limb, coracoclavicular joint. Features and attachments of the clavicle conoid tubercle attachment point of the conoid ligament the medial part of the coracoclavicular.
Conoid tubercle medical definition merriamwebster medical. Conoid tubercle tuberculum conoideum is a bump on the inferior surface of the bone, near the acromial end. The attachment of the trapezoid ligament is indicated by the trapezoid line that spreads out laterally from the conoid tubercle. The deep layers of paint, viewed through the more superficial layers. Features and attachments of the clavicle conoid tubercle attachment point of the conoid ligament the medial part of the coracoclavicular ligament. Bolded or underlined statements are previous questions.
Discuss how the structures of the shoulder complex. Coen, md history during the renaissance, a unique style of painting called glazing was developed. Conoid tubercle of clavicle definition of conoid tubercle. The lateral surface of the greater tubercle is convex, rough, and continuous with the lateral surface of the body. Immediately above the first rib the bone has a cylindrical part called shaft, and two ends, lateral and medial. The deltoid tubercle of spine of scapula is a prominence on the spine of scapula.
Anatomy and physiology in context reading assignment. The conoid ligament attaches to the clavicle at the conoid tubercle and the trapezoid ligament attaches at the trapezoid line. The coracoclavicular ligament can be divided into two parts, the more medial conoid ligament and trapezoid ligament. 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 it marks the insertion of the conoid ligament which along with the trapezoid ligament forms part of the coracoclavicular ligament complex they can be quite prominent and hypertrophied. Conoid tubercle found on the lateral end of the clavicle and. These muscle attachments, especially the greater tubercle, projects laterally relative to the humerus and posteriorly relative to the lesser tubercle.
Articulates medially with the manubrium sterni and laterally with the acromion of the scapula. The transverse humeral ligament forms a broad band bridging the lesser and greater tubercle of the humerus. Clavicle news newspapers books scholar jstor july 2009 learn how and when to remove this template message. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Absent ho trauma, bilateral and the smooth corticated margin point to a congenital origin of this anomaly and differente it from post. Tubercle definition of tubercle by the free dictionary.
The clavicle, or collarbone, is a long bone that serves as a strut between the shoulder blade and the sternum breastbone. Chapter 2 gross anatomy of the shoulder christopher m. Conoid ligament definition of conoid ligament by medical. What are the attachments for the flexor retinaculum. One last feature that will be discussed in this section is the intertubercular groove or sulcus. The pectoral girdle the two bones of the shoulder, the clavicle and the scapula, comprise the pectoral. This is an article about the anatomy and function of the shoulder girdle pectoral girdle including its muscles, bones and joints. 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. In anatomy the term is applied to natural prominences in certain muscles, to nerve nuclei of the central nervous system, and to eminences on bones, especially in regions where muscles through tendons or bones through ligaments are attached.
Sitminorsupraspinatus,infraspinatus,teres minor inserted on gretaer tubercle of humerus on posterior side of top of humerus. Conoid tubercle article about conoid tubercle by the. The conoid ligament attaches to the clavicle at the conoid tubercle, which is posterior medial to the trapezoid tubercle. Its attachments are limited superior to the epiphysial line. Ta the prominence near the lateral end of the inferior surface of the clavicle that gives attachment to the conoid ligament. The latter produces two prominent markings on the inferior surface of the lateral aspect of the clavicle, the conoid tubercle and, lateral to it, the trapezoid line. The attachments extended from 15 to 30 mm in sagittal. The conoid tubercle is found on the lateral end acromial extremity of the clavicle, and is located posteriorly. What is the most lateral and superior landmark on the scapula. Conoid tubercle synonyms, conoid tubercle pronunciation, conoid tubercle translation, english dictionary definition of conoid tubercle. The coracoid process is a small hooklike structure on the lateral edge of the superior anterior. The conoid ligament attaches to the clavicle at the conoid tubercle, which is. Hook of hamate, scaphoid tubercle, trapezoid tubercle, tubercle of triquetral. Attachments by rainbow rowell goodreads share book.
The conoid tubercle is a small bony prominence on the inferior surface of the lateral of the clavicle, closer to the midline of the clavicle. Thus, although the articular disc serves as a shock absorber of forces transmitted along the clavicle. Inferiorly, the surface is roughened medially by attachments of the costoclavicular ligament and the subclavius muscle and laterally by the coracoclavicular ligament. Bones of the thorax uams department of anatomy and. The long head of the biceps has its origin just inferior to the coracoid process in the supraglenoid tubercle of the scapula. The lesser tubercle, in comparison to the greater tubercle, projects medially and anteriorly. The conoid ligaments began at the medial posterior margin of the coracoid process and directed toward to the conoid tubercle in the clavicle. The shaft length is relatively smooth along its superior surface while on the inferior bottom surface we can detect bumpy areas called the conoid tubercle and trapezoid ridge or line. The artist applied to the canvas thin, transparent coats of different colors.
Elevation that runs obliquely from the conoid tubercle to the lateral end of the clavicle attachment point for the trapezoid ligament. 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. The bone is the bond of connection between the clavicle and scapula, for in this respect. The muscles that provide the movement for the shoulder and upper arm include the anterior muscles in the front, the posterior muscles in the back, and the shoulder muscles that are sort of in between. The spine, at lateral to the root of the spine, curves down and laterally to form a lip. The trapezoid ridge spreads forwards as well as laterally through conoid tubercle. Inferiorly the conoid and trapezoid components of the cc ligament provide stability between the clavicle and the coracoid process of the scapula.
The shoulder girdle is also called the pectoral girdle, and it is a bone ring. It is a long bone, curved somewhat like the italic letter f, and placed nearly horizontally at the upper and anterior part of the thorax, immediately above the first rib. It is the site of attachment for several structures. It is distinguished as a broad rough surface over 2 cm in length, and is the site where costoclavicular ligament attaches. Together with the shoulder blade, it makes up the shoulder girdle. By enclosing the canal of the bicipital groove, it functions to hold the long head of the biceps tendon within the bicipital groove. 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. Laughlin dawes, radiology picture of the day the conoid tubercle or coracoid tuberosity is a rough eminence on the posterior inferior. The conoid tubercle is located near the posterior border on the junction of the lateral onefourth along with medial threefourth of the clavicle on the inferior surface. Plot lincolns the guy who monitors email at his work.
The short head of biceps brachii muscle to radial tuberosity. Subscapularis inserted on lesser tubercle of humerus. From superior to inferior, the conoid ligament appears as an inferior pointing cone. Prominent conoid tubercle 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. This book is distributed under the terms of the creative commons. Conoid, meaning coneshape, comes from the greek konos for cone and eidos meaning shape.
Thus the dynamics of the shoulder girdle, and in particular the scapula, is of interest as it relates to the lengthtension. External occipital protuberance, medial portion of superior nuchal line of occiput, ligamentum nuchae and spinous processes of c7 through t12. Greater and lesser tubercles are right below the anatomical neck and are separated by the. Sep 10, 2011 radiology cases and radiology case reports. There are five muscles that make their origin or insertion on the clavicle. It marks the insertion of the conoid ligament which along with the trapezoid. These are the sites of conoid and trapezoid ligament attachments that connect the clavicle to the scapula. The clavicle, or collarbone, is a long bone that serves as a strut between the shoulder blade. The clavicle is displaced inferiorly relative to the acromion process. It marks the insertion of the conoid ligament which along with the trapezoid ligament forms part of the coracoclavicular ligament complex. Just below the head you find the anatomic neck, which is a slightly narrower portion of the bone. The shoulder and arm bones can be broken or dislocated by traumatic injuries. Aug 31, 2018 features and attachments of the clavicle conoid tubercle attachment point of the conoid ligament the medial part of the coracoclavicular ligament.
The lateral third of the clavicle serves as attachments for the deltoid and trapezius muscles anteriorly and posteriorly, respectively. This reference is not to the shape of the tubercle, but the ligament that attaches to the tubercle. The ligament is formed by the conoid ligament and trapezoid ligament. Kineseology 4 shoulder book these cards are from the book. Between the greater tubercle and the lesser tubercle is the bicipital groove intertubercular sulcus. Name the 12 muscle attachment sites on the scapula. The supraglenoid tubercle has more attachments than. Conoid tubercle definition of conoid tubercle by the free. Chapter 12 disorders of the acromioclavicular joint david n.
14 16 1016 536 455 141 123 791 1661 1108 411 583 1031 162 9 1165 1618 214 353 1257 81 1482 1201 989 433 341 748 631 853 961 917 96 1551 693 591 483 1432 1542 372 1401 1196 1163 1397 648 466 1060