Upper Extremity Structure Information: Ligaments

Question 1

Coracoclavicular ligament

Answer 1

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

Question 2

Acromioclavicular ligament

Answer 2

function- stabilizes acromioclavicular joint

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

Question 3

Costoclavicular ligament

Answer 3

function- stabilizes sternoclavicular joint, limiting elevation of the clavicle

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

Tension with scapular elevation and retraction

Question 4

Coracoacromial ligament

Answer 4

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

Question 5

Coracohumeral ligament

Answer 5

function- reinforces superoanterior aspects of joint capsule

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

Question 6

Superior transverse scapular ligament

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 ligaments (three ligg.; superior, middle, inferior)

Answer 8

function- stabilizes glenohumeral articulation

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

Question 9

Sternoclavicular and interclavicular ligaments

Answer 9

Sternoclavicular: anterior and posterior

function - acts to stabilize the sternoclavicular joint