Shoulder

Question 1

Match the description to its structure:
1. Surgical neck
2. Anatomical neck
a) The site of proximal growth plate of the humerus
b) Constriction distal to the tubercles

Answer 1

1b, 2a

Question 2

What type of joint is the glenohumeral joint and what motion does it allow?

Answer 2

Multiaxial, ball-and-socket; flexion/extension on the sagittal plane, lateral/medial rotation on the transverse plane, abduction/adduction on the coronal plane

Question 3

What passively stabilizes the glenohumeral joint?

Answer 3

Glenoid labrum and glenohumeral ligaments

Question 4

What actively stabilizes the glenohumeral joint?

Answer 4

Rotator cuff muscles (Supraspinatus, infraspinatus, teres minor, subscapularis)

Question 5

What motion does the supraspinatus allow for?

Answer 5

Abduction

Question 6

What innervates the supraspinatus?

Answer 6

Suprascapular nerve

Question 7

What motion does the infraspinatus allow?

Answer 7

Lateral rotation

Question 8

What innervates the infraspinatus?

Answer 8

Suprascapular nerve

Question 9

What movement does the teres minor allow?

Answer 9

Adduction

Question 10

What innervates the teres minor?

Answer 10

Axillary nerve

Question 11

What motions does the subscapularis allow?

Answer 11

Medial rotation and adduction

Question 12

What innervates the subscapularis?

Answer 12

Sup. and inf. subscapular nerves

Question 13

What are the three parts of the deltoid muscle and their functions?

Answer 13

Clavicular (flexion), acromial (abduction), spinal (extension)

Question 14

What innervates the deltoid muscles?

Answer 14

Axillary nerve

Question 15

What actions does the teres major allow?

Answer 15

Adduction, medial rotation and extension

Question 16

What innervates the teres major?

Answer 16

Lower subscapular nerve

Question 17

What are the thoracohumeral muscles?

Answer 17

Latissimus dorsi and pectoralis major