Chapter 008 The Elbow and Radioulnar Joints
True / False Questions
1. The scapula, humerus, and ulna serve as proximal attachments for the muscles that pronate
and supinate the radioulnar joints.
True False
2. The elbow joint is classified as a condyloid joint that allows only flexion and extension.
True False
3. The ulnar collateral ligament is critical to providing medial support to prevent the elbow
from abducting (not a normal movement of the elbow) when stressed in physical activity.
True False
4. The two bones that allow supination and pronation are the ulna and the humerus.
True False
5. When one holds a screwdriver in the right hand and attempts to fully tighten a screw, the
movement consists of radioulnar supination, which usually involves laterally rotating and
flexing the glenohumeral and elbow joints, respectively.
True False
6. The brachialis assists in supination because it inserts on the radius.
True False
7. The anconeus and the triceps brachii work synergistically to extend the elbow joint.
True False
8-1
Chapter 008 The Elbow and Radioulnar Joints
8. The biceps brachii has three heads like the triceps brachii.
True False
9. The median nerve innervates the triceps brachii.
True False
10. The brachioradialis muscle performs flexion of the elbow joint in a neutral position.
True False
Multiple Choice Questions
11. The muscles of the elbow and radioulnar joints are all innervated from the median nerves,
___________________, and radial nerves of the brachial plexus.
A. musculocutaneous nerves
B. accessory nerves
C. sciatic nerves
D. long thoracic nerves
12. The radial nerve supplies innervation to the
A. brachialis.
B. biceps brachii.
C. triceps brachii.
D. pronator teres.
13. The short head of the biceps brachii attaches to the
A. acromion process.
B. coracoid process.
C. spine of the scapula.
D. lateral clavicle.
8-2
Chapter 008 The Elbow and Radioulnar Joints
14. A key bony landmark for the radius is the
A. olecranon process.
B. coronoid process.
C. lateral epicondyle.
D. radial tuberosity.
15. The two bones of the radioulnar joint provide the actions of ______________.
A. flexion and extension
B. supination and pronation
C. flexion and abduction
D. abduction and adduction
16. The pronator quadratus is a small muscle located __________ on the ________ end of the
forearm.
A. proximally; anterior
B. proximally; posterior
C. distally; anterior
D. distally; posterior
17. The proximal end of the brachioradialis attaches to the
A. styloid process.
B. medial epicondyle.
C. olecranon process.
D. lateral supracondylar ridge of the humerus.
18. The pronator teres performs pronation, but also assists in weak
A. flexion of the elbow joint.
B. extension of the elbow joint.
C. supination of the elbow joint.
D. flexion of the glenohumeral joint.
8-3
Chapter 008 The Elbow and Radioulnar Joints
19. The pronator teres is able to perform pronation because it inserts on the
A. ulna.
B. humerus.
C. radius.
D. scapula.
20. The insertion of the supinator is on the
A. coronoid process of the ulna.
B. lateral surface of the upper third of the radius.
C. radial tuberosity.
D. olecranon process.
21. The anconeus, triceps brachii, and supinator are located on the
A. anterior region of the upper extremity.
B. lateral region of the upper extremity.
C. posterior region of the upper extremity.
D. distal end of the upper extremity.
22. The action that the brachioradialis, brachialis, biceps brachii, and pronator teres all have in
common is
A. flexion.
B. extension.
C. supination.
D. pronation.
23. The biceps brachii performs flexion best in a(n) _______________ position.
A. pronated
B. supinated
C. neutral
D. extended
8-4
Chapter 008 The Elbow and Radioulnar Joints
24. The triceps brachii and the anconeus both insert on the _____________________.
A. radial tuberosity of the radius
B. coronoid process of the ulna
C. corocoid process of the scapula
D. olecranon process of the ulna
25. The triceps brachii and the anconeus are __________________.
A. antagonists
B. synergists
C. neutralizers
D. flexors of the elbow joint
26. The long head of the triceps is located on the
A. infraglenoid tubercle of the scapula.
B. supraglenoid tubercle of the scapula.
C. coracoid process.
D. acromion process.
27. The long head of the biceps brachii originates on the
A. infraglenoid tubercle of the scapula.
B. coracoid process.
C. supraglenoid tubercle of the scapula.
D. acromion process.
28. The brachialis performs true _________ as it inserts only on the _________.
A. extension; radius
B. flexion; radius
C. extension; ulna
D. flexion; ulna
8-5
Chapter 008 The Elbow and Radioulnar Joints
29. The brachioradialis inserts on the ____________________.
A. styloid process of the radius
B. coronoid process of the ulna
C. radial tuberosity of the radius
D. corocoid process of the scapula
30. The muscles that are actively contracted on the anterior position of the humerus during
flexion of the elbow joint are
A. triceps brachii and biceps brachii.
B. triceps brachii and anconeus.
C. biceps brachii and brachialis.
D. brachioradialis and biceps brachii.
31. The pronator teres originates on the
A. lateral epicondyle of the humerus and the radius.
B. medial epicondyle of the humerus and the radius.
C. medial epicondyle of the humerus and the ulna.
D. lateral epicondyle of the humerus and the ulna.
32. The muscles that provide the opposite action to supination would be
A. biceps brachii, triceps brachii, and anconeus.
B. pronator teres, pronator quadratus, and brachioradialis.
C. brachialis, biceps brachii, and brachioradialis.
D. triceps brachii, brachialis, and anconeus.
33. The brachioradialis is unique as it performs both
A. flexion and extension.
B. abduction and adduction.
C. supination and pronation.
D. supination and extension.
8-6
Chapter 008 The Elbow and Radioulnar Joints
34. The supinator only performs
A. flexion.
B. extension.
C. pronation.
D. supination.
35. The only actions of the elbow joint are
A. supination and pronation.
B. flexion and extension.
C. abduction and adduction.
D. supination and flexion.
36. Due to the multiarticular orientation of the biceps brachii, all three joints must be
positioned appropriately to achieve optimal _______.
A. stretching
B. angle of pull
C. strength
D. pull
37. This muscle is the only true flexor of the elbow.
A. Triceps
B. Brachioradialis
C. Brachialis
D. Pronator teres
38. Push-ups demand strenuous contraction of what muscle?
A. Latissimus dorsi
B. Triceps brachii
C. Trapezius
D. Serratus
8-7
Chapter 008 The Elbow and Radioulnar Joints
39. Some clinicians believe that this muscle may be a continuation of the triceps.
A. Latissimus dorsi.
B. Posterior deltoid.
C. Anconeus.
D. Trapezius.
40. What motion of the forearm can be performed with a dumbbell sleeve to develop the
pronator teres muscle?
A. Supination
B. Extension
C. Adduction
D. Pronation
41. For shoulder stability, it is important to strengthen what part of the biceps brachii?
A. Belly
B. Distal
C. Proximal
D. Lateral
42. To stretch the short head of the biceps brachii, what position should the hands be in while
moving into extension?
A. Palms out
B. Palms in
C. Palms neutral
D. Palms facing midline
43. Injury to this small elbow flexor can be extremely painful.
A. Biceps brachii
B. Brachialis
C. Pronator teres
D. Brachioradialis
8-8
Chapter 008 The Elbow and Radioulnar Joints
44. This muscle is one of three muscles on the lateral forearm sometimes known as the
"mobile wad of three."
A. Pronator teres
B. Biceps brachii
C. Brachioradialis
D. Triceps brachii
45. This muscle's main action is forceful extension of the forearm.
A. Anterior deltoid
B. Triceps brachii
C. Pectoralis minor
D. Pronator teres
46. This muscle is strengthened the same way as triceps brachii.
A. Latissimus dorsi
B. Pectoralis major
C. Anconeus
D. Teres major
47. The elbow must be fully extended while taking the forearm into full supination to stretch
this muscle.
A. Brachialis
B. Pronator teres
C. Pronator quadratus
D. Supinator
48. The pronator quadratus muscle moves the forearm in what way?
A. Pronation
B. Supination
C. Adduction
D. Flexion
8-9
Chapter 008 The Elbow and Radioulnar Joints
49. The muscle of the forearm is very deep and difficult to palpate.
A. Brachioradialis
B. Pronator quadratus
C. Brachialis
D. Supinator
50. Extending the elbow and ulnar flexing the wrist stretches what muscle?
A. Triceps
B. Pronator teres
C. Supinator
D. Brachialis
Fill in the Blank Questions
51. The medial condyloid ridge, olecranon process, and coronoid process are all bony
landmarks for the __________.
________________________________________
52. The biceps brachii perform strong elbow flexion in a(n) _____________ position.
________________________________________
53. As the elbow reaches full extension, the __________ of the ulna is received by the
_____________ of the humerus.
________________________________________
54. The radioulnar joint is classified as a(n) ____________ joint.
________________________________________
8-10
Chapter 008 The Elbow and Radioulnar Joints
55. The biceps brachii and the triceps brachii are clearly _____________ muscles.
________________________________________
56. To demonstrate ___________ the therapist would move the forearm of the client to the
shoulder by bending the elbow to decrease its angle.
________________________________________
57. To demonstrate ____________ the therapist would move the forearm of the client away
from the shoulder by straightening the elbow to increase its angle.
________________________________________
58. To demonstrate _____________ the therapist would medially rotate the client's radius on
the ulna that would result in the hand moving from the palm-up to the palm-down position.
________________________________________
59. To demonstrate ________________, the therapist would laterally rotate the client's radius
on the ulna that would result in the hand moving from the palm-down to the palm-up
position.
________________________________________
60. The biceps brachii assists in ___________ with the supinator.
________________________________________
61. The brachioradialis is innervated by the _____________ nerve.
________________________________________
8-11
Chapter 008 The Elbow and Radioulnar Joints
62. The lateral head and medial head of the triceps brachii insert on the
__________________________.
________________________________________
63. The triceps brachii can be easily palpated on the _______________.
________________________________________
64. The muscle that is located neutrally on the forearm from the styloid process of the radius
to the supracondylar ridge of the humerus is called the ________________.
________________________________________
65. The small muscle that assists the triceps brachii in extension of the elbow joint is the
____________.
________________________________________
66. The muscle that is deep to the bicep brachii is called the _____________.
________________________________________
67. The lower-half of the anterior shaft of the humerus is the origin of __________.
________________________________________
68. The brachioradialis is repetitively used in the ________________ position.
________________________________________
69. The _____________ nerve innervates the pronator teres.
________________________________________
8-12
Chapter 008 The Elbow and Radioulnar Joints
70. The ___________________ originates on the distal fourth of the anterior ulna.
________________________________________
71. In order for the action of supination to occur, muscles that supinate must insert on the
_______________.
________________________________________
72. The elbow joint is comprised of the ulna and the _____________.
________________________________________
73. The biceps brachii insert on the _____________.
________________________________________
74. Bony landmarks on the distal end of the humerus that are origins for the supinator and
pronator teres are ______________ and _____________ respectively.
________________________________________
75. The largest muscle in the forearm is the ________________.
________________________________________
8-13
Chapter 008 The Elbow and Radioulnar Joints Key
True / False Questions
1. The scapula, humerus, and ulna serve as proximal attachments for the muscles that pronate
and supinate the radioulnar joints.
TRUE
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-2
Learning Outcome: 8-3
Learning Outcome: 8-6
2. The elbow joint is classified as a condyloid joint that allows only flexion and extension.
FALSE
The elbow joint is a ginglymus or hinge joint that allows only flexion and extension.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-1
Learning Outcome: 8-2
Learning Outcome: 8-3
Learning Outcome: 8-8
3. The ulnar collateral ligament is critical to providing medial support to prevent the elbow
from abducting (not a normal movement of the elbow) when stressed in physical activity.
TRUE
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Hard
Learning Outcome: 8-8
8-14
Chapter 008 The Elbow and Radioulnar Joints Key
4. The two bones that allow supination and pronation are the ulna and the humerus.
FALSE
The two bones that interact to allow supination and pronation are the ulna and the radius.
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-1
Learning Outcome: 8-2
Learning Outcome: 8-8
5. When one holds a screwdriver in the right hand and attempts to fully tighten a screw, the
movement consists of radioulnar supination, which usually involves laterally rotating and
flexing the glenohumeral and elbow joints, respectively.
TRUE
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Hard
Learning Outcome: 8-8
6. The brachialis assists in supination because it inserts on the radius.
FALSE
The brachialis inserts on the ulna and can only perform flexion of the elbow joint.
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-1
Learning Outcome: 8-2
Learning Outcome: 8-6
Learning Outcome: 8-8
8-15
Chapter 008 The Elbow and Radioulnar Joints Key
7. The anconeus and the triceps brachii work synergistically to extend the elbow joint.
TRUE
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-1
Learning Outcome: 8-7
Learning Outcome: 8-8
8. The biceps brachii has three heads like the triceps brachii.
FALSE
The biceps brachii has two heads, long head and short head both attaching to the scapula.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-1
Learning Outcome: 8-4
Learning Outcome: 8-5
9. The median nerve innervates the triceps brachii.
FALSE
The radial nerve innervates the triceps brachii.
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-1
10. The brachioradialis muscle performs flexion of the elbow joint in a neutral position.
TRUE
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-1
Learning Outcome: 8-8
8-16
Chapter 008 The Elbow and Radioulnar Joints Key
Multiple Choice Questions
11. The muscles of the elbow and radioulnar joints are all innervated from the median nerves,
___________________, and radial nerves of the brachial plexus.
A. musculocutaneous nerves
B. accessory nerves
C. sciatic nerves
D. long thoracic nerves
Only the musculocutaneous nerves travel to the upper extremity out of the list provided. The
musculocutaneous nerves innervate the biceps brachii and the brachialis.
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-1
12. The radial nerve supplies innervation to the
A. brachialis.
B. biceps brachii.
C. triceps brachii.
D. pronator teres.
The biceps brachii and brachialis are supplied by the musculocutaneous nerve and the
pronator teres is innervated by the median nerve.
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-1
8-17
Chapter 008 The Elbow and Radioulnar Joints Key
13. The short head of the biceps brachii attaches to the
A. acromion process.
B. coracoid process.
C. spine of the scapula.
D. lateral clavicle.
The short head of the biceps brachii does attach at the coracoid process.
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-4
Learning Outcome: 8-5
Learning Outcome: 8-6
14. A key bony landmark for the radius is the
A. olecranon process.
B. coronoid process.
C. lateral epicondyle.
D. radial tuberosity.
The olecranon process and coronoid process are bony landmarks for the ulna. The lateral
epicondyle is on the distal end of the humerus.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-2
Learning Outcome: 8-3
8-18
Chapter 008 The Elbow and Radioulnar Joints Key
15. The two bones of the radioulnar joint provide the actions of ______________.
A. flexion and extension
B. supination and pronation
C. flexion and abduction
D. abduction and adduction
The radioulnar joint is a pivot joint and provides supination and pronation of the radius.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-1
Learning Outcome: 8-8
16. The pronator quadratus is a small muscle located __________ on the ________ end of the
forearm.
A. proximally; anterior
B. proximally; posterior
C. distally; anterior
D. distally; posterior
The pronator quadratus is a deep pronator that is on the distal anterior end of the forearm
before the wrist.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-1
Learning Outcome: 8-4
Learning Outcome: 8-5
Learning Outcome: 8-6
8-19
Chapter 008 The Elbow and Radioulnar Joints Key
17. The proximal end of the brachioradialis attaches to the
A. styloid process.
B. medial epicondyle.
C. olecranon process.
D. lateral supracondylar ridge of the humerus.
The brachioradialis originates at the lateral supracondylar ridge of the humerus.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-1
Learning Outcome: 8-4
Learning Outcome: 8-5
Learning Outcome: 8-6
18. The pronator teres performs pronation, but also assists in weak
A. flexion of the elbow joint.
B. extension of the elbow joint.
C. supination of the elbow joint.
D. flexion of the glenohumeral joint.
The pronator teres assist is weak flexion of the elbow joint besides its major action of
pronation.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-1
Learning Outcome: 8-7
Learning Outcome: 8-8
8-20
Chapter 008 The Elbow and Radioulnar Joints Key
19. The pronator teres is able to perform pronation because it inserts on the
A. ulna.
B. humerus.
C. radius.
D. scapula.
The radius moves against the ulna in a pivot joint. Supinators and pronators must attach to the
radius in order to perform their actions. If they attach to the ulna, they will only perform
flexion and extension.
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-1
Learning Outcome: 8-7
Learning Outcome: 8-8
20. The insertion of the supinator is on the
A. coronoid process of the ulna.
B. lateral surface of the upper third of the radius.
C. radial tuberosity.
D. olecranon process.
The supinator must insert on the radius in order to perform supination.
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-4
Learning Outcome: 8-6
8-21
Chapter 008 The Elbow and Radioulnar Joints Key
21. The anconeus, triceps brachii, and supinator are located on the
A. anterior region of the upper extremity.
B. lateral region of the upper extremity.
C. posterior region of the upper extremity.
D. distal end of the upper extremity.
The anconeus and triceps brachii are located on the posterior humerus and the supinator has a
posterior position from the distal end of the humerus to the ulna and inserting on the lateral
surface of the upper third of the radius.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-4
Learning Outcome: 8-6
22. The action that the brachioradialis, brachialis, biceps brachii, and pronator teres all have in
common is
A. flexion.
B. extension.
C. supination.
D. pronation.
Flexion is the only common action of the listed muscles.
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-7
Learning Outcome: 8-8
8-22
Chapter 008 The Elbow and Radioulnar Joints Key
23. The biceps brachii performs flexion best in a(n) _______________ position.
A. pronated
B. supinated
C. neutral
D. extended
The biceps brachii inserts on the radial tuberosity, which promotes a strong flexion in
supination.
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-6
Learning Outcome: 8-7
Learning Outcome: 8-8
24. The triceps brachii and the anconeus both insert on the _____________________.
A. radial tuberosity of the radius
B. coronoid process of the ulna
C. corocoid process of the scapula
D. olecranon process of the ulna
The triceps brachii and the anconeus both share attachments on the olecranon process.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-4
Learning Outcome: 8-5
Learning Outcome: 8-6
8-23
Chapter 008 The Elbow and Radioulnar Joints Key
25. The triceps brachii and the anconeus are __________________.
A. antagonists
B. synergists
C. neutralizers
D. flexors of the elbow joint
The triceps brachii and the anconeus work synergistically to perform extension of the elbow
joint.
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-7
Learning Outcome: 8-8
26. The long head of the triceps is located on the
A. infraglenoid tubercle of the scapula.
B. supraglenoid tubercle of the scapula.
C. coracoid process.
D. acromion process.
This attachment provides weak extension of the glenohumeral joint.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-4
Learning Outcome: 8-5
Learning Outcome: 8-6
8-24
Chapter 008 The Elbow and Radioulnar Joints Key
27. The long head of the biceps brachii originates on the
A. infraglenoid tubercle of the scapula.
B. coracoid process.
C. supraglenoid tubercle of the scapula.
D. acromion process.
This attachment provides weak flexion of the glenohumeral joint and opposes weak extension
of the triceps brachii.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-4
Learning Outcome: 8-5
Learning Outcome: 8-6
28. The brachialis performs true _________ as it inserts only on the _________.
A. extension; radius
B. flexion; radius
C. extension; ulna
D. flexion; ulna
The brachialis performs true flexion as it inserts only on the coronoid process of the ulna.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-4
Learning Outcome: 8-5
Learning Outcome: 8-6
8-25
Chapter 008 The Elbow and Radioulnar Joints Key
29. The brachioradialis inserts on the ____________________.
A. styloid process of the radius
B. coronoid process of the ulna
C. radial tuberosity of the radius
D. corocoid process of the scapula
This long muscle must have a distal attachment to perform movements from supination and
pronation and be in the neutral position.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-4
Learning Outcome: 8-5
Learning Outcome: 8-6
30. The muscles that are actively contracted on the anterior position of the humerus during
flexion of the elbow joint are
A. triceps brachii and biceps brachii.
B. triceps brachii and anconeus.
C. biceps brachii and brachialis.
D. brachioradialis and biceps brachii.
Active flexion of the elbow joint would engage the biceps brachii and the brachialis.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-8
8-26
Chapter 008 The Elbow and Radioulnar Joints Key
31. The pronator teres originates on the
A. lateral epicondyle of the humerus and the radius.
B. medial epicondyle of the humerus and the radius.
C. medial epicondyle of the humerus and the ulna.
D. lateral epicondyle of the humerus and the ulna.
The pronator teres is perfectly opposed to the supinator in its location of the opposite side of
the joint. The two muscles are antagonists.
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-4
Learning Outcome: 8-5
Learning Outcome: 8-6
32. The muscles that provide the opposite action to supination would be
A. biceps brachii, triceps brachii, and anconeus.
B. pronator teres, pronator quadratus, and brachioradialis.
C. brachialis, biceps brachii, and brachioradialis.
D. triceps brachii, brachialis, and anconeus.
The antagonists for supination would only be pronator teres, pronator quadratus, and the
brachioradialis.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-7
Learning Outcome: 8-8
8-27
Chapter 008 The Elbow and Radioulnar Joints Key
33. The brachioradialis is unique as it performs both
A. flexion and extension.
B. abduction and adduction.
C. supination and pronation.
D. supination and extension.
The brachioradialis performs supination from pronation and pronation from supination; it
would be used turning a door knob or a screwdriver.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-8
34. The supinator only performs
A. flexion.
B. extension.
C. pronation.
D. supination.
This muscle is named for its action.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-1
Learning Outcome: 8-8
35. The only actions of the elbow joint are
A. supination and pronation.
B. flexion and extension.
C. abduction and adduction.
D. supination and flexion.
The elbow joint is a hinge joint and can only perform flexion and extension.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-1
Learning Outcome: 8-8
8-28
Chapter 008 The Elbow and Radioulnar Joints Key
36. Due to the multiarticular orientation of the biceps brachii, all three joints must be
positioned appropriately to achieve optimal _______.
A. stretching
B. angle of pull
C. strength
D. pull
The biceps is actually considered a three-joint (multiarticular) muscle—shoulder, elbow, and
radioulnar.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-9
37. This muscle is the only true flexor of the elbow.
A. Triceps
B. Brachioradialis
C. Brachialis
D. Pronator teres
The brachialis muscle is used along with other flexor muscles, regardless of pronation or
supination.
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-7
8-29
Chapter 008 The Elbow and Radioulnar Joints Key
38. Push-ups demand strenuous contraction of what muscle?
A. Latissimus dorsi
B. Triceps brachii
C. Trapezius
D. Serratus
Overhead presses and triceps curls (elbow extensions from an overhead position) also
emphasize the triceps.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-9
39. Some clinicians believe that this muscle may be a continuation of the triceps.
A. Latissimus dorsi.
B. Posterior deltoid.
C. Anconeus.
D. Trapezius.
The chief function of the anconeus muscle is to pull the synovial membrane of the elbow joint
out of the way of the advancing olecranon process during extension of the elbow.
Bloom's: Knowledge
Difficulty: Difficult
Difficulty: Medium
Learning Outcome: 8-6
40. What motion of the forearm can be performed with a dumbbell sleeve to develop the
pronator teres muscle?
A. Supination
B. Extension
C. Adduction
D. Pronation
Referred to as neutralizing, they contract to resist specific actions of other muscles.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-9
8-30
Chapter 008 The Elbow and Radioulnar Joints Key
41. For shoulder stability, it is important to strengthen what part of the biceps brachii?
A. Belly
B. Distal
C. Proximal
D. Lateral
It is weak in shoulder joint actions, although it does assist in providing dynamic anterior
stability to maintain the humeral head in the glenoid fossa.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Easy
Difficulty: Medium
Learning Outcome: 8-9
42. To stretch the short head of the biceps brachii, what position should the hands be in while
moving into extension?
A. Palms out
B. Palms in
C. Palms neutral
D. Palms facing midline
The palms out position internally rotates the humerus, isolating the short head during the
stretch.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-9
8-31
Chapter 008 The Elbow and Radioulnar Joints Key
43. Injury to this small elbow flexor can be extremely painful.
A. Biceps brachii
B. Brachialis
C. Pronator teres
D. Brachioradialis
Stretching this muscle by gentle extension of the elbow can help restore blood flow.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-9
44. This muscle is one of three muscles on the lateral forearm sometimes known as the
"mobile wad of three."
A. Pronator teres
B. Biceps brachii
C. Brachioradialis
D. Triceps brachii
The other two muscles are the extensor carpi radialis brevis and extensor carpi radialis longus,
to which the brachioradialis lies directly anterior.
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-4
Learning Outcome: 8-5
8-32
Chapter 008 The Elbow and Radioulnar Joints Key
45. This muscle's main action is forceful extension of the forearm.
A. Anterior deltoid
B. Triceps brachii
C. Pectoralis minor
D. Pronator teres
The golf and tennis swing would be impossible without the use of the triceps brachii.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-7
Learning Outcome: 8-9
46. This muscle is strengthened the same way as triceps brachii.
A. Latissimus dorsi
B. Pectoralis major
C. Anconeus
D. Teres major
Any extension of the forearm exercise strengthens this muscle.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-9
47. The elbow must be fully extended while taking the forearm into full supination to stretch
this muscle.
A. Brachialis
B. Pronator teres
C. Pronator quadratus
D. Supinator
It can be stretched by holding a dumbbell sleeve or hammer handle.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-9
8-33
Chapter 008 The Elbow and Radioulnar Joints Key
48. The pronator quadratus muscle moves the forearm in what way?
A. Pronation
B. Supination
C. Adduction
D. Flexion
It is commonly used in turning a screwdriver or in movements requiring extension and
pronation.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-7
49. The muscle of the forearm is very deep and difficult to palpate.
A. Brachioradialis
B. Pronator quadratus
C. Brachialis
D. Supinator
Because of the deep location of the pronator quadratus, specific therapeutic techniques are
difficult.
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-5
50. Extending the elbow and ulnar flexing the wrist stretches what muscle?
A. Triceps
B. Pronator teres
C. Supinator
D. Brachialis
This muscle is strengthened the same way biceps brachii is.
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-9
8-34
Chapter 008 The Elbow and Radioulnar Joints Key
Fill in the Blank Questions
51. The medial condyloid ridge, olecranon process, and coronoid process are all bony
landmarks for the __________.
ulna
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-2
Learning Outcome: 8-3
52. The biceps brachii perform strong elbow flexion in a(n) _____________ position.
supinated
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-7
Learning Outcome: 8-8
53. As the elbow reaches full extension, the __________ of the ulna is received by the
_____________ of the humerus.
olecranon process; olecranon fossa
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-2
Learning Outcome: 8-3
54. The radioulnar joint is classified as a(n) ____________ joint.
trochoid or pivot-type
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-1
8-35
Chapter 008 The Elbow and Radioulnar Joints Key
55. The biceps brachii and the triceps brachii are clearly _____________ muscles.
antagonistic
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-7
Learning Outcome: 8-8
56. To demonstrate ___________ the therapist would move the forearm of the client to the
shoulder by bending the elbow to decrease its angle.
flexion
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Hard
Difficulty: Medium
Learning Outcome: 8-8
57. To demonstrate ____________ the therapist would move the forearm of the client away
from the shoulder by straightening the elbow to increase its angle.
extension
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Hard
Difficulty: Medium
Learning Outcome: 8-8
58. To demonstrate _____________ the therapist would medially rotate the client's radius on
the ulna that would result in the hand moving from the palm-up to the palm-down position.
pronation
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Hard
Difficulty: Medium
Learning Outcome: 8-8
8-36
Chapter 008 The Elbow and Radioulnar Joints Key
59. To demonstrate ________________, the therapist would laterally rotate the client's radius
on the ulna that would result in the hand moving from the palm-down to the palm-up
position.
supination
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Hard
Difficulty: Medium
Learning Outcome: 8-8
60. The biceps brachii assists in ___________ with the supinator.
supination
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-7
61. The brachioradialis is innervated by the _____________ nerve.
radial
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-1
62. The lateral head and medial head of the triceps brachii insert on the
__________________________.
posterior head of the humerus above and below the spiral groove
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-6
8-37
Chapter 008 The Elbow and Radioulnar Joints Key
63. The triceps brachii can be easily palpated on the _______________.
posterior humerus
Bloom's: Application
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-5
64. The muscle that is located neutrally on the forearm from the styloid process of the radius
to the supracondylar ridge of the humerus is called the ________________.
brachioradialis
Bloom's: Application
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-4
Learning Outcome: 8-5
Learning Outcome: 8-6
65. The small muscle that assists the triceps brachii in extension of the elbow joint is the
____________.
anconeus
Bloom's: Application
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-1
Learning Outcome: 8-7
66. The muscle that is deep to the bicep brachii is called the _____________.
brachialis
Bloom's: Application
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-1
Learning Outcome: 8-4
Learning Outcome: 8-5
8-38
Chapter 008 The Elbow and Radioulnar Joints Key
67. The lower-half of the anterior shaft of the humerus is the origin of __________.
brachialis muscle
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-1
Learning Outcome: 8-4
Learning Outcome: 8-5
Learning Outcome: 8-6
68. The brachioradialis is repetitively used in the ________________ position.
neutral
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-8
69. The _____________ nerve innervates the pronator teres.
median
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-1
70. The ___________________ originates on the distal fourth of the anterior ulna.
pronator quadratus
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-5
Learning Outcome: 8-6
8-39
Chapter 008 The Elbow and Radioulnar Joints Key
71. In order for the action of supination to occur, muscles that supinate must insert on the
_______________.
radius
Bloom's: Application
Bloom's: Comprehension
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-1
Learning Outcome: 8-8
72. The elbow joint is comprised of the ulna and the _____________.
humerus
Bloom's: Knowledge
Difficulty: Easy
Learning Outcome: 8-1
Learning Outcome: 8-2
73. The biceps brachii insert on the _____________.
radial tuberosity
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-5
Learning Outcome: 8-6
74. Bony landmarks on the distal end of the humerus that are origins for the supinator and
pronator teres are ______________ and _____________ respectively.
lateral epicondyle; medial epicondyle
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-2
Learning Outcome: 8-3
8-40
Chapter 008 The Elbow and Radioulnar Joints Key
75. The largest muscle in the forearm is the ________________.
brachioradialis
Bloom's: Application
Bloom's: Knowledge
Difficulty: Medium
Learning Outcome: 8-4
Learning Outcome: 8-5
8-41