AD 7 Posterior Shoulder

Question 1

What are the three bilateral joints between the upper limb and appendicular skeleton

Answer 1

Glenohumeral, acromioclavicular and sternoclavicular

Question 2

What region of the deltoid extends the shoulder

Answer 2

Posterior (spinal part)

Question 3

What region of the deltoid abducts at shoulder (taking over from supraspinatus at 15 degrees)

Answer 3

Middle (acromial) part

Question 4

What part of deltoid is involved mainly in the flexion at shoulder

Answer 4

Anterior (clavicular)

Question 5

What is the ascending part of trapezius involved in

Answer 5

scapular depression

Question 6

What is the middle part of the trapezius involved in

Answer 6

scapular retraction

Question 7

What is the descending part of trapezius involved in

Answer 7

scapular elevation

Question 8

How does the trapezius produce superior rotation of glenoid fossa

Answer 8

Ascending and descending parts contracting

Question 9

What movement is levator scapulae involved in

Answer 9

Elevated the scapula and inferior rotation of glenoid fossa

Question 10

What are the two rhomboid muscles

Answer 10

Rhomboid major and minor

Question 11

What are the functions of these two rhomboids

Answer 11

Retraction of scapula and inferior rotation of glenoid fossa

Question 12

What are the muscles of the rotator cuff

Answer 12

supraspinatus, infraspinatus, teres minor, subscapularis

Question 13

What are the collective role of the rotator cuff muscles

Answer 13

stabilise the head of humerus

Question 14

What is another role of the supraspinatus muscle

Answer 14

First 15 degrees of abduction at shoulder

Question 15

What is another role of the infraspinatus muscle

Answer 15

lateral rotation of shoulder

Question 16

What is another role of teres minor

Answer 16

lateral rotation of shoulder

Question 17

What is another role of subscapularis

Answer 17

medial rotation at shoulder

Question 18

What is the role of teres major

Answer 18

adduction/ medial rotation at shoulder

Question 19

Where do the rotator cuff muscles attach between

Answer 19

the scapula proximially and tubercules of the head of humerus distally

Question 20

what are the distal insertions of supraspinatus, infraspinatus and teres minor

Answer 20

greater tubercule of the humerus

Question 21

What are the distal insertions of subscapularis

Answer 21

lesser tubercule of the humerus

Question 22

What is the innervation of the rotator cuff muscles

Answer 22

branches of brachial plexus

Question 23

What leads to painful arc syndrome

Answer 23

impingement of supraspinatus tendon between humerus and acromion process

Question 24

Where are common fracture sites

Answer 24

clavicle (middle third) and humerus (surgical neck and midshaft)

Question 25

What joint is commonly subluxed/ dislocated

Answer 25

acromioclavicular

Question 26

What is the most common rotator cuff injjury

Answer 26

impingement of the supraspinatus tendon

Question 27

What is quadrangular space syndrome

Answer 27

impingement of axillary nerve and posterior circumflex humeral artery

Question 28

What makes up the borders of the quadrangular space

Answer 28

teres major, teres minor, humerus and long head of tricep