Page 196 - Clinical Anatomy

ECA3 7/18/06 6:45 PM Page 181

The bones and joints of the upper limb 181

Fig. 132◊The bony components of the elbow joint. Note the three sets of articular
surfaces.

Fig. 133◊The joint capsule of the right elbow—lateral aspect.

attached distally to the annular ligament around the radial head. In order to
allow rotation of the radius, the lower margin of the annular ligament is
free and, beneath it, the synovium of the elbow bulges downwards on to the
neck of the radius.
Two sets of movements take place at the elbow:
1◊◊flexion and extension at the humero-ulnar and humeroradial joints;
2◊◊pronation and supination at the proximal radio-ulnar (in conjunction
with associated movements of the distal radio-ulnar joint).