| A | B |
|---|
| acromioclavicular joint | a synovial joint between the distal clavicle and the proximal acromion of the scapula |
| ac joint is surrounded by ...which includes | • the joint is surround by a dense, fibrous capsule which includes the superior and inferior acromioclavicular ligaments |
| ac joint stability is provided by...which permit the scapula to | by three ligaments: - acromioclavicular ligament - coracoclavicular ligament - conoid and trapezoid ligaments. these ligaments permit the scapula to move on the clavicle about three axes |
| the range of motion between the clavicle and the scapula shows: | 30o about the conoid ligament - 60o arc for hinging about the trapezoid ligament - 30o arc for hinging about the transverse axis in the sagittal plane |
| the ac joint allow the ability | to raise the arm above the head |
| strernoclavicular joint | a synovial joint between the manubrium of the sternum and the proximal clavicle |
| principle stabilizing strucutre of sternoclavicular joint is the | costoclavicular ligament |
| costococlavicular ligament | securely attaches the clavicle to the first rib and controls the motion between the flat surfaces of the clavicle and the manubrium |
| movement of the clavicle at the SC joint occur in...directions. which are | three directions (i.e. 3 DOF) - elevation and depression - protraction and retraction - rotation (anterior and posterior) |
| scapulothoracic articulation | not true joint. scapula is without bony or ligamentous connection to thorax which does allow a wide range of scapular motion. |
| motions of scapulothoracic articulation motions include | protraction/retraction, elevation/depression and rotaton |
| scapular motion is enhanced by the ST articulation, which is a | a bonemuscle- bone articulation between the scapula and the thoracic wall |
| the anterior surface of the scapula is separated from the chest wall by | the serratus anterior and the subscapularis muscles (these muscles glide on each other) |
| the serratus anterior holds the | scapula close to the chest wall through large ranges of scapular motion and prevents scapular “winging” |
| the joints of the shoulder work together to create | arm movement |
| the shoulder complex is subjected to a wide variety of injuries: | - trauma - repetitive movement |
| traumatic injuries include | sprains, subluxations, dislocations, fractures, etc. |
| repetitive movement injuries include | ectopic calcification, degeneration of cartilage, bursitis, etc. |
