CHAPTER 9 Structure and Function of the Elbow Complex
Proximal radioulnar joint from above Annular ligament
Radial notch
Fixed ulna
Rotation Pronator teres Supination Anterior Distal radioulnar joint from above
Dorsal capsular ligament
Radius Radius
Roll Slide
Supination
Palmar capsular ligament Anterior
Lateral Pronation
Dorsal capsular ligament Anterior
Medial
Roll Slide
Fixed ulna
Styloid process
Fixed ulna
Pronation Annular ligament Rotation
Anterior Distal radioulnar joint from above
Styloid process
Palmar capsular ligament
Proximal radioulnar joint from above
Radial notch
Fixed ulna
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Supination A B
Figure 9.10 (A) Anterior view of orthokinematic forearm supination and arthrokinematic motion of the radius rotating around the fixed ulna. (B) Anterior view of orthokinematic forearm pronation and the radius rolling and sliding on the fixed ulna. (From Starkey C, Brown D. Examination of Orthopedic & Athletic Injuries, 4th ed. Philadelphia, PA: F. A. Davis Company, 2015, p. 732, with permission.)
Pronation
0° (Neutral)
0° (Neutral)
0° (Neutral)
50°
50° 75° 85° 85°
50°
50° 75° 85°
50°
50° 75°
Neutral
Supination Figure 9.11 Range of motion of forearm pronation and supination.