The Shoulder.

Bones & Joints

100

This flat, triangular bone lies on the posterolateral thorax and overlaps ribs 2-7

scapula

200

This fibrocartilaginous ring attached to the glenoid margin deepens the socket and improves congruity. 

glenoid labrum

300

Of the three glenohumeral ligaments, only this one reinforces the inferior GH joint, which is why that region is the weakest

inferior glenohumeral ligament (IGHL)

400

What joint is the only attachment of the upper extremity to the axial skeleton, and what type of synovial joint is it? 

SC joint 

Saddle joint

500

On the inferior surface of the clavicle, this tubercle anchors the medial portion of the coracoclavicular ligament 

conoid tubercle

Rhythm & Impingement

100

during shoulder elevation, the scapula and humerus move together in this ratio

1:2 ratio

200

Without posterior rotation of the clavicle, shoulder flexion stops at about this many degrees

120 degrees

300

What type of impingement does the following cause:

Abnormal arthokinematics-

Bony spurs-

 

Abnormal arthokinematics- Secondary

Bony spurs- Primary

400

In phase 2, this ligament prevents any further clavicular elevation at the SC joint

Costcoclavicular ligament 

500

To clear the greater tuberosity during arm elevation, the humerus must rotate in this direction

externally (external rotation)

Muscle ID

100

Its name means "widest of the back", and it extends, adducts, and internally rotates the shoulder. 

Latissimus dorsi

200

Lying deep to the short head of the biceps, this muscle is pierced by the musculocutaneous nerve

Coracobrachialis

300

Arising from the transverse processes of C1-C4 and inserting on the superomedial scapular border, this muscle elevates the scapula

Levator scapulae

400

Nicknamed the "boxer's muscle", this muscle protracts the scapula and is used when punching

serratus anteiror

500

Arising from ribs 3-5 and inserting on the coracoid process, this muscle protracts and depresses the scapula

pectoralis minor

Force Couples & Synergies

100

Muscles balanced against one another to keep the humeral head centered in the glenoid are called these:

force couples

200

In the frontal plane force couple, this muscle exerts an upward force on the humerus during abduction

deltoid

300

If subscapularis, infraspinatus or teres minor is weak, torn, or paralyzed, the humeral head migrates in this direction

superiorly

400

If the infraspinatus is injured, the subscapularis pulls unopposed, and the humeral head migrates in this direction

anteirorly

500

in the downward rotation synergy, levator scapulae, rhomboids, and pectoralis minor are joined by this muscle, which holds the scapula to the thoracic cage. 

latissimus dorsi

Nerves & Spaces

100

What innervates the deltoid and teres minor?

Axillry nerve

200

What innervates the serratus anterior?

Long thoracic nerve

300

What innervates the biceps brachii and coracobrachialis?

Musculocutaneous nerve

400

What is the upper extremity supplied by? 

Brachial plexus

500

What are the borders of the quadrangular space?

(List and label each one)

Superior: Teres Minor

Inferior: Teres Major

Lateral: Humerus

Medial: Long head of triceps