Chapter -4 Upper Extremity

Question 1

A lateral elbow projection obtained with the distal forearm elevated (too high) demonstrates the:
1. radial head distal to the coronoid process.
2. radial head proximal to the coronoid process.
3. capitulum posterior to the trochlea.
4. capitulum anterior to the trochlea.

Answer 1

2 and 3 only

Question 2

Which of the following projections is used to prevent crossing of the forearm bones?
a. PA projection
b. AP projection

Answer 2

b. AP projection

Question 3

An AP elbow projection with accurate positioning demonstrates all the following except:
a. the ulna free of radial head and radial tuberosity superimposition.
b. an open elbow joint.
c. the medial and lateral humeral epicondyles in profile.
d. the radial tuberosity in profile medially.

Answer 3

a. the ulna free of radial head and radial tuberosity superimposition

Question 4

An AP forearm projection with accurate positioning demonstrates all of the following except:
a. coronoid process in profile.
b. olecranon process within the olecranon fossa.
c. radial styloid in profile laterally.
d. radial head superimposing the ulna by 0.25 (1/8th) inch.

Answer 4

a. coronoid process in profile.

Question 5

A less than optimal AP elbow projection demonstrating the ulna without radial head superimposition
a. was obtained with the hand pronated.
b. will also demonstrate the radial head articulating surface.
c. was obtained with the elbow in slight external rotation.
d. was obtained with the elbow in slight internal rotation.

Answer 5

c. was obtained with the elbow in slight external rotation.

Question 6

An optimal AP elbow projection is obtained when:
a. the radial head superimposes the lateral aspect of the proximal ulna by 0.25”.
b. the radial tuberosity is demonstrated in profile laterally.
c. the radial head articulating surface is demonstrated.
d. an imaginary line connecting the humeral epicondyles is aligned perpendicular with the IR

Answer 6

a. the radial head superimposes the lateral aspect of the proximal ulna by 0.25”.

Question 7

An externally rotated PA oblique wrist projection with accurate positioning demonstrates all of the following except:
a. the ulnar styloid in profile.
b. an open radioulnar articulation.
c. the trapezoid and trapezium without superimposition.
d. slight interosseus space between the 4th and 5th metacarpal shafts

Answer 7

b. an open radioulnar articulation.

Question 8

A lateral forearm projection obtained in a patient with the proximal humerus depressed demonstrates the radial head ________________ to the coronoid process.

Answer 8

anterior

Question 9

A PA hand projection obtained with the fingers flexed demonstrates
1. foreshortened phalanges.
2. the thumb close to a lateral projection.
3. closed IP joint spaces.

Answer 9

1, 2, & 3

Question 10

When reviewing an image of an AP humerus, it is noticed that the radius head superimposes less than 1/8th inch of the ulna, this indicates that the patient had their arm:
a. slightly internally rotated
b. slightly externally rotated

Answer 10

b. slightly externally rotated

Question 11

An internally rotated AP oblique elbow projection with accurate positioning demonstrates which of the following structures in profile?
1. Capitulum
2. Radial head
3. Medial trochlea
4. Coronoid process

Answer 11

3 and 4 only

Question 12

A lateral wrist projection obtained with the wrist in slight internal rotation (pronation) demonstrates the:
1. scaphoid anterior to the pisiform.
2. radius posterior to the ulna.
3. scaphoid distal to the pisiform. 4. radius anterior to the ulna.

Answer 12

1 and 4 only

Question 13

A less than optimal lateral wrist projection demonstrating the scaphoid anterior to the pisiform,
a. was obtained with the wrist internally rotated.
b. will also demonstrate the ulna anterior to the radius.
c. will also demonstrate the distal scaphoid proximal to the pisiform.
d. was obtained with the wrist in ulnar flexion.

Answer 13

a. was obtained with the wrist internally rotated.

Question 14

A PA wrist projection with accurate positioning demonstrates
1. an open radioulnar articulation.
2. the radial styloid in profile.
3. the long axes of the third metacarpal aligned with the midforearm.
4. open second through fifth CMC joint spaces.

Answer 14

1, 2, 3, and 4

Question 15

A lateral elbow projection demonstrates the radial head situated anterior to the coronoid process and the capitulum is proximal to the trochlea. This indicates that the proximal humerus was ____________.
a. elevated
b. depressed

Answer 15

b. depressed