Quiz Questions

Question 1

The slope of the stress/strain curve indicates the tendency for a material’s stiffness properties to change when a load is applied over a sustained period of time (True/False)

Answer 1

False

Question 2

Based on the arthrokinematic rules that we discussed, what are the associated arthrokinematics during open kinematic chain glenohumeral abduction

Answer 2

inferior glide
superior roll

Question 3

What factors affect torque

Answer 3

• magnitude of force
• location of force application
• direction of force application

Question 4

In which position is a muscle at its weakest

Answer 4

at its shortest physiological length

Question 5

Which of the following describes an open kinematic chain motion at the knee?
A) rising from a chair
B) squatting to pick up a box
C) gliding on ice skates
D) swinging a leg to kick a ball

Answer 5

D) swinging a leg to kick a ball

Question 6

Assume you are standing with your arms at your side. If I give you a ball and ask you to hold it in the palm of your hand with your elbow flexed at 90 deg., which of the following is true?
A) your elbow flexors have mechanical advantage over the ball
B) the ball has mechanical advantage over your elbow flexors
C) it is not possible to hold a ball in this position
D) the forces generated by the ball and your elbow flexors must be equal

Answer 6

B) the ball has mechanical advantage over your elbow flexors

Question 7

The closed packed position of a joint frequently coincides with the position of greatest joint congruence (True/False)

Answer 7

True

Question 8

Based on your knowledge of the radoiocarpal joint, how many rotational (i.e. angular) degrees of freedom does it have

Answer 8

two

Question 9

Which of the following is NOT an arthrokinematic motion?
A) slide
B) torsion
C) roll
D) spin

Answer 9

B) torsion

Question 10

Open kinematic chain glenohumeral abduction is best described as which plane and axis of rotation

Answer 10

humeral movement in the frontal plane around an anterior-posterior axis

Question 11

What is the normal ROM at the glenohumeral joint full flexion

Answer 11

120 degrees

Question 12

Which of the following joint motions occur during the lifting portion of a normal shoulder shrug?
- glenohumeral abduction
- sternoclavicular depression
- sternoclavicular elevation
- acromioclavicular joint downward rotation
- acromioclavicular joint upward rotation

Answer 12

• sternoclavicular elevation
• acromioclavicular joint downward rotation

Question 13

During arthroscopic shoulder surgery, there is a risk of damage to the axillary nerve due to its location. Which of the following glenohumeral motions would be weakened the most if the axillary nerve, which innervates trees minor & deltoid, was damaged?
- internal rotation
- extension
- external rotation
- flexion

Answer 13

• external rotation

Question 14

Which motions are associated with normal arthrokinematics during open kinematic chain external rotation at the glenohumeral joint?

Answer 14

• posterior roll
• anterior glide

Question 15

Which ligament limits abduction at the glenohumeral joint?

Answer 15

• coracohumeral ligament

Question 16

Which motions are associated with normal arthrokinematics during open kinematic chain elevation at the sternoclavicular joint?

Answer 16

• superior roll
• inferior glide

Question 17

What components of full open kinematic chain shoulder complex abduction does the sternoclavicular joint contribute the most?

Answer 17

• the majority of this joint’s ROM occurs during the EARLY phase of abduction
• a posterior arthrokinematic spin of the clavicle occurs at this joint during full abduction of the shoulder complex

Question 18

What components of full open kinematic chain shoulder complex abduction does the acromioclavicular joint contribute the most?

Answer 18

• the majority of this joint’s ROM occurs during the LATE phase of abduction
• external rotation occurs at this joint to maximize full abduction ROM
• upward rotation of the scapula occurs at this joint to maximize full abduction ROM

Question 19

During full shoulder complex abduction (open kinematic chain), what ligament is responsible for the posterior rotation of the clavicle?

Answer 19

• coracoclavicular ligament