Shoulder arthrology Flashcards
Coracoclavicular ligament
function- stabilizes acromioclavicular joint limiting medial displacement, protraction & elevation
1. Trapezoid
attachments- from coracoid process to trapezoid line of clavicle
2. Conoid
attachments- from coracoid process to conoid tubercle of clavicle
Acromioclavicular ligament
function- stabilizes acromioclavicular joint
attachments- from superior aspect of acromial end of the clavicle to adjacent acromion
Coracoacromial
function- prevents the superior displacement of the humeral head by forming the coracoacromial arch
attachments- from lateral border of coracoid process to acromion adjacent to clavicular articulation
Coracohumeral ligament
function- reinforces superoanterior aspects of joint capsule
attachments- from base of coracoid process to anterior aspect greater tubercle
Costoclavicular ligament
function- stabilizes sternoclavicular joint, limiting elevation of the clavicle
attachments- from superior aspect of cartilage of first rib to undersurface of the clavicle
Superior transverse scapular ligament
function- closes off the suprascapular notch
attachments- from the base of the coracoid process to the medial edge of the scapular notch
Glenoid capsule
attachments- from the circumference of glenoid cavity to anatomical neck of the humerus
Glenohumeral (three ligg.; superior, middle, inferior)
function- stabilizes glenohumeral articulation
attachments- from upper part of medial margin of glenoid cavity to lesser tubercle & anatomical neck
Shoulder flexion
Primary: Ant deltoid
Secondary: Pec major, coracobrachialis
Shoulder abduction
Primary:Deltoid, supraspinatus
Secondary: trapezius, serratus ant
Shoulder extension
Primary: Posterior deltoid
Secondary: lats, teres major
Shoulder adduction
Primary: Pec major, lats
Secondary: teres major, triceps, and coracobrachialis
Shoulder internal rotation
Primary: Subscapularis, lats
Secondary: Pec major,
Shoulder external rotation
Primary: infraspinatus
Secondary: Supraspinatus, teres minor
sternoclavicular (SC)
Sellar joint (has an articular disc) protraction/retraction=same roll/glide, Elevation depression=opposite roll/glide
acromioclavicular (AC)
Planar joint
Protraction/Retraction=A/P glide
Abd/Add=acromion rotates on clavicle
Glenohumeral (GH)
Ball and socket joint
humeral head will glide away from the tightest part of the capsule
Muscular stabilizers of the shoulder
Supraspinatus, infraspinatus, subscapularis, teres minor, deltoid
Subacromial Impingement pathology
repeated compression of RTC tendon and/or long head of biceps along the bursa
