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Chapter 13

EXERCISE 2: WHAT STRUCTURE IS THIS?

Exercise 2 Objective: Teach the user to recognize radiographic anatomy on the normal radiographs of the routine evaluation of the cervical spine elbow.

Exercise type: 2: What Structure is This?

Instruction: User will look at the highlighted structure and identify it from a list of five possibilities.

View: Anteroposterior Elbow

What structure is this?

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A. humeroradial joint

B. humeroulnar joint

C. proximal radioulnar joint

D. capitulum

E. trochlea

Question Rationale: A depression called the radial notch is located on the lateral aspect of the coronoid process of the proximal ulna; the radial head articulates with it forming the proximal radioulnar joint.

What structure is this?

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A. humeroradial joint

B. humeroulnar joint

C. proximal radioulnar joint

D. capitulum

E. trochlea

Question Rationale: The trochlea is on the medial side of the distal humerus and articulates with the ulna, forming the humeroulnar joint.

What structure is this?

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A. humeroradial joint

B. humeroulnar joint

C. proximal radioulnar joint

D. capitulum

E. trochlea

Question Rationale: The rounded capitulum is on the lateral aspect of the humerus and articulates with the radial head, forming the humeroradial joint.

What structure is this?