Figure 2. Extension of allodynia and hyperalgesia beyond all fiber borders of the ulnar nerve territory for each subject. Subject 4 is represented by the square. The origin corresponds to the ulnar nerve territory border (all fiber types). Negative numbers correspond to those secondary zones that remained within the ulnar nerve territory. Extraterritorial mechanical allodynia or hyperalgesia failed to develop in only one subject. Extraterritorial hyperalgesia but not allodynia developed in three subjects.