Shoulder arthrology

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

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 ligament

Answer 4

function- reinforces superoanterior aspects of joint capsule
attachments- from base of coracoid process to anterior aspect greater tubercle

Question 5

Costoclavicular ligament

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 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 (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

Shoulder flexion

Answer 9

Primary: Ant deltoid
Secondary: Pec major, coracobrachialis

Question 10

Shoulder abduction

Answer 10

Primary:Deltoid, supraspinatus
Secondary: trapezius, serratus ant

Question 11

Shoulder extension

Answer 11

Primary: Posterior deltoid
Secondary: lats, teres major

Question 12

Shoulder adduction

Answer 12

Primary: Pec major, lats
Secondary: teres major, triceps, and coracobrachialis

Question 13

Shoulder internal rotation

Answer 13

Primary: Subscapularis, lats
Secondary: Pec major,

Question 14

Shoulder external rotation

Answer 14

Primary: infraspinatus
Secondary: Supraspinatus, teres minor

Question 15

sternoclavicular (SC)

Answer 15

Sellar joint (has an articular disc)
protraction/retraction=same roll/glide, 
Elevation depression=opposite roll/glide

Question 16

acromioclavicular (AC)

Answer 16

Planar joint
Protraction/Retraction=A/P glide
Abd/Add=acromion rotates on clavicle

Question 17

Glenohumeral (GH)

Answer 17

Ball and socket joint

humeral head will glide away from the tightest part of the capsule

Question 18

Muscular stabilizers of the shoulder

Answer 18

Supraspinatus, infraspinatus, subscapularis, teres minor, deltoid

Question 19

Subacromial Impingement pathology

Answer 19

repeated compression of RTC tendon and/or long head of biceps along the bursa