Ligaments of the Shoulder Complex

Question 1

Coracoclavicular ligament function

Answer 1

stabilizes AC joint limiting medial displacement, protraction & especially the elevation of the clavicle on the scapula

2 ligaments: trapezoid and conoid

Question 2

Trapezoid (coracoclavicular lig) lig attachments:

Answer 2

• from coracoid process to trapezoid line of clavicle

Question 3

Conoid ligament attachments (coracoclavicular lig):

Answer 3

from coracoid process to conoid tubercle of clavicle

Question 4

Acromioclavicular ligament function

Answer 4

Stabilizes the AC joint

Question 5

Acromioclavicular ligament attachments

Answer 5

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

Question 6

Coracoacromial ligament function

Answer 6

prevents the superior displacement of the humeral head by forming the coracoacromial arch

Question 7

Coracoacromial attachments

Answer 7

-from lateral border of coracoid process to acromion adjacent to clavicular articulation

Question 8

Coracohumeral lig function

Answer 8

reinforces superoanterior aspects of glenohumeral joint capsule

Question 9

coracohumeral lig attachments

Answer 9

from base of coracoid process to anterior aspect greater tubercle

Question 10

Costoclavicular ligament function

Answer 10

stabilizes sternoclavicular joint, limiting elevation of the clavicle

Question 11

Costoclavicular lig attachments

Answer 11

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

Question 12

superior transverse scapular ligament function

Answer 12

closes off the suprascapular notch

Question 13

superior transverse scapular attachments

Answer 13

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

Question 14

Glenoid capsule attachments

Answer 14

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

Question 15

Functions of the glenohumeral ligaments - superior, middle, inferior

Answer 15

stabilizes the glenohumeral articulation

SUPERIOR–resists inferior glide of the humerus on glenoid at 0 degrees of abduction

MIDDLE- resists anterior glide of the humerus on the glenoid and limits external rotation with the humerus at 45 degrees of abduction

INFERIOR glenohumeral lig complex-resists inferior glide of humerus on the glenoid fossa and limits external rotation and internal rotation of humerus at 90 degrees of abduction.
-main static stabilizer of the GH joint with arm at 90 degrees of abduction

-anterior band:
—primary ER restraint at 90 degrees of abduction/scaption
—IR: ant band restrains against inf. translation
—ER: primary restraint against anterior translation

-posterior band:
—-with ER; the posterior band is the restraint against inferior translation
—-with IR; the posterior band restrains against posterior translation

Question 16

Glenohumeral ligaments attachments

Answer 16

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

Question 17

Interclavicular ligament attachments (SC joint) attachments

Answer 17

The interclavicular ligament emerges from the deep cervical fascia and connects the sternal ends of both clavicles, spanning the jugular notch.

Question 18

Interclavicular ligament attachments (SC joint) function

Answer 18

strengthens the superior portion of the joint capsule