The articulations of the upper extremity are the following:

1. The stemo-costo -clavicular.

2. The scapulo-clavicular union.

3. The shoulder-joint.

4. The elbow-joint.

5. The radio-ulnar union.

6. The radio-carpal or wrist-joint.

7. The carpal joints.

8. The carpo-metacarpal joints.

9. The intermetacarpal joints.

10. The metacarpo-phalangeal joints.

11. The interphalangeal joints.