Scapular Outcomes

Question 1

P, D, A, I
Deltoid

Answer 1

P: clavicle, acromion, & spine of scapula
D: deltoid tuberosity of humerus
A: flexion & medial rotation (ant), abduction (middle), extension & lateral rotation + horizontal extension (post) of humerus
I: axillary nerve (C5-6; ant, mid, post sections)

Question 2

P, D, A, I
Supraspinatus

Answer 2

P: medial 2/3 suprapinous fossa
D: superior facet of greater tubercle of humerus to shoulder joint capsule
A: initiates humeral abduction & laterally rotates humerus; stabilizes GHJ (reinforcing superior of capsule)
I: suprascapular nerve (C4-6)

Question 3

P, D, A, I
Infraspinatus

Answer 3

P: medial 2/3 of infraspinous fossa
D: middle facet greater tubercle of humerus to shoulder joint capsule
A: lateral rotation of humerus, stabilize GHJ
I: suprascapular nerve (C5-6)

Question 4

P, D, A, I
Teres minor

Answer 4

P: upper 2/3 dorsal surface of lateral border of scapula
D: inferior facet of greater tubercle of humerus to shoulder joint capsule
A:lateral rotation of humerus, stabilize GHJ
I: axillary nerve (C5-6)

Question 5

P, D, A, I
Subscapularis

Answer 5

P: subscapular fossa
D: lesser tubercle of humerus
A: medial rotation of humerus, stabilze GHJ
I: upper & lower subscapular nerves

Question 6

P, D, A, I
Teres major

Answer 6

P: dorsal surface of inferior angle scapular & lower 1/3 lateral border of scapular
D: medial lip of intertubercular sulcus of humerus
A: humeral adduction, medial rotation, & extension
I: lower subscapular nerve

Question 7

Collateral Circulation @ scapula

Answer 7

A1: subscapular artery
A2: dorsal scapular artery
A3: suprascapular artery

An. 2: dorsal scapular a. & suprascapular a.
An. 4: dorsal scapular a. & thoracodorsal a.

Question 8

Collateral circulation @ scapula

Answer 8

A1: right subclavian a.
A2: thoracodorsal a.
A3: circumflex scapular a.

An. 1: dorsal scapular a. & suprascapular a.
An. 5: suprascapular a. & circumflex scapular a.

Question 9

Collateral circulation @ scapula

Answer 9

A1: Thyrocervical Trunk
A2: Axillary a.
A3: subscapular a.

An 3: dorsal scapular a. & circumflex scapular a.

Question 10

Quadrangular Space Borders & Neurovascular Contents

Answer 10

Superior border: teres minor
Inferior border: teres major
Medial border: long head of triceps brachii
Lateral border: humerus

Nerve: axillary n.
Vascular: posterior circumflex humeral a.

Question 11

Suprascapular Notch Location & Neurovascular Contents

Answer 11

Located at superior border of scapula, medial to base of coracoid process

Nerve: Suprascapular n.
Vascular: Superascapular a.

Question 12

Triangular Space Borders & Neruovascular

Answer 12

Superior border: Teres Minor
Inferior border: Teres Major
Lateral border: long head of triceps brachii

Vascular: Circumflex scapular a.

Question 13

What is a shoulder separation?

Answer 13

Tearing of the acromioclavicular ligament and coracoclavicular ligament injures the acromicoclavicular joint
Causes: FOOSH or direct impact
Significance: Acromion is free and can move inferiorly to damage GHJ

Question 14

What is a shoulder dislocation?

Answer 14

Separation of the head of the humerus from the glenoid of the scapula
Inferior aspect of joint is not reinforced by any rotator cuff (SITS) or ligaments
Easy for head to slip out and move anteriorly (95% anterior dislocation)
Significance: Axillary nerves, vasculature, and lymph structures can be pinched/damaged

Question 15

Subacromial Space
Location & Contents

Answer 15

Location: Below acromion
Contents: Supraspinatus connecting to greater tubercle, putting at risk to rub on acromion or humerus bone
Subacromial bursa (acromion)
Subdeltiod bursa (deltiod tendon)
Subtendinous bursa of subscapularis (coracoid process)

Question 16

What is the function of a bursa?

Answer 16

Bursa are synovial membranes w/ fluid that develop to prevent friction of structures rubbing together and add cushion

Question 17

What neurovascular structures could be injured from a fracture at the medial border of the scapula?

Answer 17

transverse cervical artery
dorsal scapular nerve