Shoulder

Question 1

What lines the glenoid

Answer 1

Labrum (fibrocartilage)

Question 2

4 ligaments of shoulder capsule

Answer 2

1. Coracohumeral
2. Superior glenohumeral
3. Middle “
4. Inferior “

Question 3

What large tendon passes in the inter-tubercular groove

Answer 3

Tendon of Long head of biceps

Question 4

Where do the glenohumeral ligaments sit in respect to humeral head

Answer 4

Anteriorly

Question 5

Majority of shoulder dislocations are in what manner

Answer 5

Anterior/anteroinferior

Question 6

4 rotator cuff muscles

Answer 6

1. Supraspinatus
2. Infraspinatus
3. Teres Minor
4. Subscapularis

Question 7

Supraspinatus

Answer 7

Innervation: Suprascapular n. (C5/C6)
Origin: Supraspinous fossa
Insertion: Superior facet of Greater Tubercle (GT)
Function: Abduction (early)

Question 8

Infraspinatus

Answer 8

Innervation: Suprascapular n. (C5/C6)
Origin: Infraspinous fossa
Insertion: Middle facet of GT
Function: Lateral rotation

Question 9

Teres Minor

Answer 9

Innervation: Axillary n. (C5/C6)
Origin: Inferior border scap
Insertion: Inferior Facet GT
Function: Lateral rotation, mild adduction

Question 10

Subscapularis

Answer 10

Innervation: Superior and Inferior Subscap n. (C5/C6)
Origin: Ant/Med border scap
Insertion: Lesser Tubercle
Function: Medial rotation, mild adduction

Question 11

Deltoid

Answer 11

Innervation: Axillary n. (C5/C6)
Origin: Scap Spine (post), Acromion (lat), Clavicle (ant)
Insertion: Deltoid tuberosity
Function: Flexion (ant), abduction (lat), extension (post)

Question 12

Teres Major

Answer 12

Innervation: Inferior Subscap n. (C5/C6)
Origin: Inferior angle scap
Insertion: Med lip inter-tubercle sulcus
Function: Medial rotation, Adduction, (Extension when flexed)

Question 13

Coracobrachialis

Answer 13

Innervation: Musculocutaneous n.
Origin: Coracoid
Insertion: Med humerus (1/2 down)
Function: Flexion, Adduction, (weak med rot)

Question 14

Pec major

Answer 14

Innervation: medial (C8/T1) and Lat (C5-C7) pec n.
Origin: Clav, sternum, ribs
Insertion: Lat lip inter-tubercular groove
Function: Adduction, Med rot

Question 15

Order of Thorax muscles insertion on shoulder

Answer 15

PLT (Lat to Med)
Pec
Lat
Teres major

Question 16

What is painful arc test

Answer 16

If pain in 60-120 deg abduction —> Supraspinatus tendon inflammation

Question 17

Role of Subacromial (s.a.) and Subdeltoid (s.d.) bursae

Answer 17

It’s fluid filled and reduce friction between muscle and structures

Question 18

Where is GT with respect to humeral head

Answer 18

Most lateral (basically edge/corner)

Question 19

Where is LT with respect to humeral head

Answer 19

Lateral to head but medial to both groove and GT

Question 20

What is the difference between the anatomical neck and the surgical neck of the humerus

Answer 20

Anatomical: Junction between the end of catilage on head and rest of bone (well before shaft)
Surgical: Proximal humerus but part of shaft