Shoulder and Rotator Cuff Muscles

Question 1

Glenohumeral joint

Answer 1

Shoulder joint
Synovial
Ball and Socket
Most moveable joint in body
Multiaxial

Question 2

Glenoid labrum

Answer 2

Ring of cartilage on the edge of the glenoid cavity

Deepens the socket and makes the shoulder joint more stable

Question 3

What is the groove between the greater and lesser tubercules of the humerus?

Answer 3

Bicipital (intertubercular groove)

The tendon of biceps brachii muscle lies in it

Question 4

Anatomical neck

Answer 4

Between the head and the tubercules

Question 5

3 movements of the scapula that the trapezius can cause

Answer 5

Retraction towards the midline
Elevate
Depress

Question 6

Muscles that attach upper limb to scapula and move upper limb

Answer 6

Deltoid

4 rotator cuff muscles

Question 7

Deltoid functions

Answer 7

Covers shoulder joint anteriorly, superiorly and posteriorly
Abduction of arm (main function)
Flexion of arm
Extension of arm

Question 8

4 rotator cuff muscles

Answer 8

Supraspinatus
Infraspinatus
Teres minor
Subscapularis

Question 9

Functions of the rotator cuff muscles

Answer 9

Supraspinatus: initiates abduction of the arm (first 15 degrees)
Infraspinatus: lateral rotation of the arm
Teres minor: lateral rotation of the arm
Subscapularis: medial rotation of the arm (main medial rotator)

Question 10

Why can you not lift your arm without rotating it laterally?

Answer 10

The greater tubercule gets stopped by the acromion

Question 11

Muscles of the back that attach scapula to the axial skeleton and move scapula

Answer 11

Trapezius
Rhomboids
Levator scapulae