RAD4064 Elbow & Forearm session quiz

Why do we do a AP not a PA forearm?

• To reduce magnification

• The radius and ulna overlap in the PA position

• To visualise the elbow joint

• The wrist is better visualised in the AP view

Why have the shoulder, elbow and wrist all in the same horizontal plane?

• To reduce magnification of different areas of the forearm

• To prevent rotation of the radius/ulna

• To obtain the whole forearm in 1 image

• To prevent elongation/foreshortening of the radius/ulna

What type of joint is the elbow?

• Synovial saddle

• Synovial condyloid

• Synovial hinge

• Synovial plane

On the lateral projection, what positioning error would result in overlapping of the radial head and humeral epicondyles?

• Over rotation

• Under rotation

• Elbow/Wrist not in the same horizontal plane

• Shoulder/Elbow not in the same horizontal plane

Which of these factors do not affect fracture healing?

• Age
• Infection

• Malunion

• Ethnicity

What is wrong with this image (if anything)

• Nothing

• Radius overlaps the ulna

• Humeral condyles not superimposed

• Humeral condyles not superimposed and radius overlaps ulna