joints of thoracic wall Flashcards
costotransverse ligament and lateral costotransverse ligament
fibrous band between the transverse process and neck of the rib
costovertebral
- synovial type joint
- articulate with head of each rib with superior demifacet or costal facet of corresponding vertebral body
- also articulates with inferior demifacet or costal facet of vertebral body superior to it
sternocostal joint
1st rib: is primary cartilaginous joint
2nd-7th ribs : synovial plane joints
articulation of costal cartilages with sternum
sternoclavicular
- saddle type of synovial joint
- functions as a ball and socket joint
- articulation of sternal end of clavicle with manubrium and 1st costal cartilages
- SC is divided into two compartments by an articular disc
-articular disc functions as a shock absorber, which leads to fractures being common and not dislocations
costochondral
primarily cartilaginous
articulation of lateral end of costal cartilage with sternal end of rib
interchondral joint
synovial plane joint
articulation between costal cartilage of :
6-7 ribs
7-8 ribs
8-9 ribs
manubriosternal
secondary cartilaginous joint (symphysis)
articulation between manubrium and sternum. fuse in older people
xiphisternal
primary cartilaginous joint (synchondrosis)
articulation between xiphoid process and body of sternum. often fuse in older people
interclavicular ligament
- strengthens the capsule of SC joint superiorly
- attaches to sternal ends of clavicles, and to the superior border of the manubrium
costoclavicular ligament
anchors the inferior surface of sternal end of clavicle to the 1st rib and its costal cartilage
-limits elevation of the pectoral girdle
acromioclavicular joint
- plane synovial articulation
- acromial end of the clavicle articulates with acromium
coracoclavicular ligament
subdivided into conoid and trapezoid ligament
- anchors the clavicle to the coracoid process of the scapula
trapezoid: nearly horizontal
conoid: vertical and more medial
glenohumeral joint
- ball-and-socket
- synovial joint that permits wide range of movement
- relatively unstable
coraco-acromial ligament
- formed by inferior aspect of acromion and coracoid process of the scapula
- coraco-acromial arch overlies the head of the humorous, preventing superior displacement
glenoid cavity and glenoid labrum
glenoid cavity: forms the glenohumeral joint along with humorous
glenoid labrum: fibrocartilaginous rim attached around the glenoid cavity
fibrous capsule and synovial membrane : loose inferiorly in adducted position
lecture 11 at bottom pictures
glenohumeral ligaments
composed of a superior, middle and inferior ligament
-combine to form the glenohumeral joint capsule connecting the glenoid fossa to the humorous
coraco humeral ligament
transverse humeral ligament
-extends between the lesser and greater tubercles of the humorous
