Shoulder

Question 1

The most complex joint in the human body is:

Answer 1

Shoulder joint

Question 2

The scapula is angled __ degrees anterior to the coronal plane

Answer 2

30

Question 3

The glenoid fossa is __ degrees externally rotated from the coronal plane and facing __ degrees superiorly

Answer 3

7, 5

Question 4

The humoral head points ___ 30 degrees

Answer 4

Posterior

Question 5

The humeral head inclination angle is ___ degrees

Answer 5

45

Question 6

In general, the proximal clavicle slides ___ to humeral movement

Answer 6

Opposite

Question 7

The average forward elevation of the arm is not quite 180 degrees. What is responsible for the remaining motion?

Answer 7

Thoracic extension and posterior tilt of the scapula

Question 8

____ rhythm accounts for the full 180 degrees of abduction

Answer 8

Scapulohumeral (for every 2 degrees of humeral movement the scapula moves 1 degree. *after the initial 30 degrees)

Question 9

Right shoulder flexion will cause the thoracic spinouses to deviate ___

Answer 9

To the right

Question 10

The production of two equal forces in opposite directions is called a _____

Answer 10

Force couple

Question 11

Motion that redirects joint force towards the center of the joint (ex: glenohumeral joint) is called _____

Answer 11

Joint centration

Question 12

The force couple of abduction: the supraspinatus and deltoid pull the humerus upward, while the ____ muscles (3) pull it downward to keep it in the glenoid fossa

Answer 12

1. Infraspinatus
2. Teres minor
3. Subscapularis

Question 13

Another force couple-transverse plane: internal rotation of the humerus is done by the subscapularis, while external rotation is ____ (2)

Answer 13

Infraspinatus, Teres minor

Question 14

Open packed position for shoulder

Answer 14

60 degrees of “scaption”

Question 15

Closed packed position of shoulder:

Answer 15

Full abduction and external rotation