Arthrology: Ligaments of Shoulder Girdle

Question 1

Coracoclavicular

Answer 1

function- stabilizes acromioclavicular joint limiting medial displacement, protraction & especially elevation of the clavicle on the scapula

1. Trapezoid
   attachments- from coracoid process to trapezoid line of clavicle
2. Conoid
   attachments- from coracoid process to conoid tubercle of clavicle

Question 2

Acromioclavicular

Answer 2

function- stabilizes acromioclavicular joint

attachments- from superior aspect of acromial end of the clavicle to adjacent acromion

Question 3

Coracoacromial

Answer 3

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

Question 4

Coracohumeral

Answer 4

function- reinforces superoanterior aspects of glenohumeral joint capsule

attachments- from base of coracoid process to anterior aspect greater tubercle

Question 5

Costoclavicular

Answer 5

function- stabilizes sternoclavicular joint, limiting elevation of the clavicle

attachments- from superior aspect of cartilage of first rib to undersurface of the clavicle

Question 6

Superior transverse scapular

Answer 6

function- closes off the suprascapular notch

attachments- from the base of the coracoid process to the medial edge of the scapular notch

Question 7

Glenoid capsule

Answer 7

attachments- from the circumference of glenoid cavity to anatomical neck of the humerus

Question 8

Glenohumeral ligament - superior

Answer 8

function- stabilizes glenohumeral articulation

Resists inferior glide at 0 degrees ABD;

Limits ER at 0 and 45 degrees ABD

attachments- from upper part of medial margin of glenoid cavity to lesser tubercle & anatomical neck

Question 9

Glenohumeral ligaments - middle

Answer 9

function- stabilizes glenohumeral articulation

Resists anterior glide at 45 degrees ABD

Limits ER at 45 degrees ABD

attachments- from upper part of medial margin of glenoid cavity to lesser tubercle & anatomical neck

Question 10

Glenohumeral ligaments - inferior GH complex

Answer 10

function- stabilizes glenohumeral articulation

Resists inferior glide at 90 degrees ABD

Limits ER at 90 degrees of ABD (anterior band)

Limits IR at 45 and 90 degrees ABD (anterior/posterior band)

Main static stabilizer of GH joint at 90 degrees ABD.

attachments- from upper part of medial margin of glenoid cavity to lesser tubercle & anatomical neck